List of Engine Sentai Go-onger characters

Sōsuke Esumi (江角 走輔, Esumi Sōsuke), the team leader, nicknamed the "Speed King," was formerly a race car driver training under Tojiro Fuji. Possessing a sunny disposition, he was referred to by his racing team as "Miracle Esumi" for his belief in miracles. Unyielding to the point of obstinance and always full of confidence, he confronts all obstacles without hesitation. He is often seen flipping a Go-onger coin for good luck. When Speedor becomes rusted Sōsuke crosses paths with his former mentor, who aids him by reminding him that a miracle takes more than one person to make by himself. He is very protective of his teammates; when Saki expresses that she wants to be pretty for a boyfriend who will appreciate her and makes a date with a young musician not long after, Sōsuke worries that she intends to leave the team to get married. Sōsuke is thought to secretly like Miu Sutō; in GP 30 ("Friendship's Punch"), while under the influence of a Gaiark energy drink, he gives her a ring. After the final battle, Sōsuke returns to racing, but because of his long absence from the racing circuit, he has to start from the bottom as a go-kart driver.

After transforming into Go-on Red (ゴーオンレッド, Gōon Reddo), Sōsuke says, "Mach Full Force!! Go-on Red" (マッハ全開！！ゴーオンレッド, Mahha Zenkai!! Gōon Reddo). Sōsuke and Speedor say, "The Burning Crimson Speed Kings!! We are the Go-on Mach Team" (真っ赤に燃えるスピードキング！！俺達ゴーオンマッハ組, Makka ni Moeru Supīdo Kingu!! Oretachi Gōon Mahhagumi). With his high speed abilities, he uses the Mantan Gun in Rod Mode to execute the Go-on Thrust (ゴーオンスラスト, Gōon Surasuto), which skewers multiple enemies, and the Spin Rod Crash (スピンロッドクラッシュ, Supin Roddo Kurasshu). With Go-on Blue with the Cowl Laser and Go-on Yellow with the Bridge Axe, he can perform Go-on Bond Spirits (ゴーオンキズナスピリッツ, Gō-on Kizuna Supirittsu) with the Rocket Daggers.[2]

During the events of Go-onger vs. Gekiranger, Sōsuke learns an enhanced version of his Saber Straight combined with his own Geki manifested into an image of Speedor, dubbing it the Geki Speedor Saber Straight (ゲキスピードルサーベルストレート, Geki Supīdoru Sāberu Sutorēto). His Engine Fist move is the Drrr-Drrr Bullet (ドルドル弾, Doru Doru Dan), performed with the Mantan Gun. With GekiRed and Rio, he can perform the Geki-Rin Engine Bullet (激臨炎神弾, Gekirin Enjin Dan). During the events of Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!, Go-on Red uses the Kyoryu Disk on the Mantan Gun to become Hyper Go-on Red (ハイパーゴーオンレッド, Haipā Gōon Reddo). In this form, Go-on Red's Mantan Gun gains the same powers as the Kyoryumaru.

Sōsuke is portrayed by Yasuhisa Furuhara (古原 靖久, Furuhara Yasuhisa). As a child, he is portrayed by Hiroto Terui (照井 宙斗, Terui Hiroto).

Renn Kōsaka (香坂 連, Kōsaka Ren), the second in command, nicknamed the "Cyclopedia" for his attention to the smallest detail, is a former bus driver who tends to be somewhat talkative. Because of his doting personality and cooking expertise, he has been referred to as the Go-ongers' "mother" (オカン, okan) by the other Go-ongers and even his own Engine partner, Bus-on; he takes no offense to and even revels in the reference. The son of a family that runs a beachside inn, Renn, as a young boy, prayed and offered omelettes every day to a guardian statue in the eventually futile hope that his sickly mother would recover. The guardian statue turned out to be the sealed form of the Arerunbra Uzumaquixote, which Renn learned only after Kitaneidas and Kegareshia tried to claim it. Renn carries a small memo notebook, which is the source of his massive knowledge; in it, he jots down notes about and draws doodles of the enemies the team faces, even in the middle of a fight. Not only is Renn the "mother" of the team, but he is also the chief technician; he made modifications to the Engines so they could come together in the G6 and G9 formations, developed the Kyuyu Soul and the Kankanbar, and assisted the Go-on Wings in fine-tuning the Go-Roader GT. After the final battle, Renn becomes Sōsuke's mechanic in the go-kart racing circuit.

As Go-on Blue (ゴーオンブルー, Gōon Burū), Renn's physical strength is magnified. After transforming into Go-on Blue, Renn says, "Just Correct!! Go-on Blue" (ズバリ正解！！ゴーオンブルー, Zubari Seikai!! Gōon Burū). With the Mantan Gun in Rod Mode, he can execute the Go-on Drift (ゴーオンドリフト, Gōon Dorifuto). With the Mantan Gun in Gun Mode he can execute the Sniper Shoot (スナイパーシュート, Sunaipā Shūto). His Engine Fist move is the On-on Bullet (オンオン弾, On'on Dan).[3]

Renn is portrayed by Shinwa Kataoka (片岡 信和, Kataoka Shinwa). As a child, he is portrayed by Shunpei Ijuin (伊集院 竣平, Ijūin Shunpei).

Saki Rōyama (楼山 早輝, Rōyama Saki), nicknamed the "Sweet Angel," was a concessions vendor who worked the stands of the Twin Ring Motegi racetrack. Cheerful and eager, she smiles and remains upbeat even in times of crisis, and exhorts her teammates to do the same. This is reflective of her personal mantra, "smile, smile," which she learned from a woodland spirit that she met when she was younger. While she and Hanto are trapped in Junk World, she reveals that she dreams of opening a cake shop someday. Her Go-Phone has multiple charms on it, differentiating it from the boys' Go-Phones. She has an older sister named Sanae, a manipulative and devilish woman who often tormented her when they were younger and continues to make trouble for her in the present time. After the final battle, Saki goes to work at a cake shop before joining the other Go-ongers in travelling across the Braneworlds to defeat any remaining members of the Gaiark.[4]

After transforming into Go-on Yellow (ゴーオンイエロー, Gōon Ierō), Saki says, "Smile Blooming!! Go-on Yellow" (スマイル満開！！ゴーオンイエロー, Sumairu Mankai!! Gōon Ierō). In the G3 Princess idol group, she says, "The 3 G's are together today as a unit!! G3 Princess" (３つのGが集まって今日だけユニット！！G３プリンセス, Mittsu no jī ga atsumatte kyō dake yunitto!! Jī Surī Purinsesu). She can fight in any hard terrain, using the Mantan Gun's Rod Mode to execute the Go-on Spin (ゴーオンスピン, Gōon Supin). With the Mantan Gun in Gun Mode, she can execute the Machinegun Shoot (マシンガンシュート, Mashingan Shūto). As part of G3 Princess with Go-on Silver and Kegalesia, she performs the Princess Cannonball (プリンセスキャノンボール, Purinsesu Kyanonbōru) after performing the G3 Triangle (G３トライアングル, Jī Surī Toraianguru) which passes the ball made by them. In the Go-on Princess, they say, "With the maidens prayer, we come into this world of flowers to make it a world of justice!! We three are the Go-on Princess!" (乙女の祈りはいつの日もこの世に花が満ちるよに正義がこの世に満ちること！！三人そろってゴーオンプリンセス, Otome no inori wa itsu no hi mo konoyo ni hana ga michiru yo ni seigi ga konoyo ni michiru koto!! San'nin sorotte Gōon Purinsesu). As part of Go-on Princess with Go-on Silver and Bearrv, she performs the Princess Triple Attack (プリンセストリプルアタック, Purinsesu Toripuru Atakku) and Princess Triple Punch (プリンセストリプルパンチ, Purinsesu Toripuru Panchi). Her Engine Fist move is the V-V Bullet (ブイブイ弾, Bui Bui Dan).

Saki is portrayed by Rina Aizawa (逢沢 りな, Aizawa Rina). As a child, she is portrayed by Asumi Kikuchi (菊池 和澄, Kikuchi Asumi).

Hanto Jō (城 範人, Jō Hanto), nicknamed the "Vagabond," is a freeter working part-time at the Doki Doki Pizzeria until Gunpei's actions cost him his job. He becomes a Go-onger when he helps Gunpei return the Engine Casts to the others. Enthusiastic, kind-hearted, but immature, Hant seems to always have a part-time job of some sort; one of these was at a crepe stand so that he could talk with girls his age (he lied to his teammates, telling them that he was working to supplement their food budget so they could buy barbecue meat). Hant's love of amusement parks prevents him from getting nauseous when Birca uses his Bircutter. After the final battle, Hant is a freeter once again, and again working for the Doki Doki Pizzeria.[5]

After transforming into Go-on Green (ゴーオングリーン, Gōon Gurīn), Hant says, "Doki Doki Delight!! Go-on Green" (ドキドキ愉快！！ゴーオングリーン, Dokidoki Yukai!! Gōon Gurīn, [Note 1]). One of his attacks is the Cycle Punch. His Engine Fist move is the Bir-Bir Bullet (バルバル弾, Baru Baru Dan).

Hanto is portrayed by Masahiro Usui (碓井 将大, Usui Masahiro).

Gunpei Ishihara (石原 軍平, Ishihara Gunpei), nicknamed the "Chaser," is a former police officer with excellent marksmanship and a passion for justice. His code name as a police officer was "Handsome Detective," and he passed himself off as such until his former partner revealed that Gunpei had never been a detective. After witnessing the primary Go-ongers in their first battles against the Gaiark, Gunpei quits the police force; because the police had considered the Gaiark out of their jurisdiction, Gunpei decided that the police had lost their sense of justice. He eventually finds out the Go-ongers' true identities and demands to become one himself, going so far as to kidnap Bomper and steal the Engine Casts to achieve that end. After learning how and why Sōsuke, Renn, and Saki were chosen, he decided to return the Engine Casts to them and, along with Hanto, was made a Go-onger by Bomper. Though he tries to come across as cool and serious, Gunpei is actually very insecure and, especially when he is around Hanto, can be quite buffoonish. After the final battle, Gunpei returns to the police force and finally becomes a detective.[6]

Gunpei initially belittles Sōsuke, Renn, and Saki for being "just" kids and claims that he is "a man more qualified to be a Go-onger." Though Kenji Ebisawa, the actor who portrays Gunpei, is indeed older than Rina Aizawa and Masahiro Usui, who plays Saki and Hanto, he is, ironically, younger than both Yasuhisa Furuhara and Shinwa Kataoka, the actors who play Sōsuke and Renn respectively.

After transforming into Go-on Black (ゴーオンブラック, Gōon Burakku), Gunpei says, "Dash Dynamic!! Go-on Black" (ダッシュ豪快！！ゴーオンブラック, Dasshu Gōkai!! Gōon Burakku). His Engine Fist move is the Ganga Ganga Bullet (ガンガガンガ弾, Ganga Ganga Dan).

Gunpei is portrayed by Kenji Ebisawa (海老澤 健次, Ebisawa Kenji).

The Go-on Wings (ゴーオンウイングス, Gōon Uingusu) are a two-man team composed of the Sutō siblings, who came from a Plutocratic lifestyle and chosen by the Wing Clan Engines due to their esper abilities, brought to the Machine World to become an elite fighting force under Jum-bowhale's guidance before the Go-onger team came to be. However, it is due to their training that the Go-on Wings see the Go-ongers as being too inexperienced to protect the Earth from Gaiark. However, after learning from Jum-bowhale about what truly made the Go-ongers who they are, the Go-on Wings join the Go-ongers as comrades. Living at their villa, the Sutō siblings come to the Go-ongers' aid whenever they feel an evil presence making its move. After transforming, they say "Take Off! Go-on Wings" (テークオフ！ゴーオンウイングス, Tēku Ofu! Gōon Uingusu), with their victory quote "Touch Down." The Go-on Wings each wear a necklace bearing the Go-on Wings crest and are fearful of ghosts since being told scary ghost stories by their grandfather. After the final battle, the Sutō siblings resume their family duties in high class society, though Hiroto was a bit reluctant to accept this role. With the Go-ongers, the groups' surnames spell "ecologist" (「え・こ・ろ・じ・い・すとう」（エコロジスト）, "E-Ko-Ro-Ji-I-Sutō" (ekorojisuto)). The two siblings' names both include the radical for feather (羽, hanezukuri). In Go-onger vs. Gekiranger, the two also learn to fight using the Fierce Beast-Fist Beast Arts style from Gorie Yen.

Hiroto Sutō (須塔 大翔, Sutō Hiroto), nicknamed the "Philosopher," is the cool and aloof leader of the Go-on Wings, and is amazing in combat. He trains extensively in boxing and kickboxing and possesses an esper ability that allows him to sense when danger is near. His seemingly cold exterior belies his fiery passion; he tells the Ancient Engines that, like them and like the Go-ongers and his sister, he will put his life on the line to protect those that he cares about. Because of this, and a separate incident which saw him care for a Wameikle from Sound World, the Go-ongers tab him as their "father." Hiroto, however, is not amused in the least by the reference, unlike Renn, who enjoys being the Go-ongers' "mother." During the Christmas incident, Hiroto, with encouragement from Saki, manages to overcome his deeply seated fear of ghosts.[7]

After transforming into Go-on Gold (ゴーオンゴールド, Gōon Gōrudo), Hiroto says "Break the Limit!! Go-on Gold" (ブレイク限界！！ゴーオンゴールド, Bureiku Genkai!! Gōon Gōrudo). With the Rocket Dagger, he can perform the following attacks: Burning Dagger, Lightning Dagger, Shining Dagger, Freezing Dagger, and Full-Power Dagger.

Hiroto is portrayed by Hidenori Tokuyama (徳山 秀典, Tokuyama Hidenori), he previously portrayed the anti-hero Sou Yaguruma in Kamen Rider Kabuto. As a child, he is portrayed by Shogo Ehara (江原 省吾, Ehara Shōgo).

Miu Sutō (須塔 美羽, Sutō Miu), nicknamed the "Lovely Sensation," is Hiroto's younger sister. A girl with a bit of a princessy attitude, her fighting style is aikido. Like Hiroto, Miu possesses an esper ability; it allows her to see things though the flowers she tends to. She idolizes and is severely dependent upon her brother, who she always addresses as "Ani" (a shortened form of "aniki," the Japanese honorific expression for "older brother"). She has a tendency to try to "improve" those she sees as lesser than she is, which Hiroto refers to as her "bad habit." Though she initially had little regard for Saki, Miu eventually becomes good friends with her. Miu also develops a bit of a love on Sōsuke, though, at first, she is hesitant to acknowledge it. She later helps Saki and Renn in regaining their courage by telling them how they changed her and her brother for the better.[8] Miu appeared as a fashionably dressed young woman in the final episode of Kaizoku Sentai Gokaiger, receiving her powers back in the form of the Go-On Silver Key as the Gokaigers left Earth.

After transforming into Go-on Silver (ゴーオンシルバー, Gōon Shirubā), Miu says "World Sparkling!! Go-on Silver" (キラキラ世界！！ゴーオンシルバー, Kirakira Sekai!! Gōon Shirubā). With the Rocket Dagger, she can perform the following attacks: Freezing Dagger, Shooting Dagger, and Full Power Dagger. As part of G3 Princess with Go-on Yellow and Kegalesia, she performs the Princess Cannonball (プリンセスキャノンボール, Purinsesu Kyanonbōru) after performing the G3 Triangle (G３トライアングル, Jī Surī Toraianguru) which passes the ball made by them.

Miu is portrayed by Yumi Sugimoto (杉本 有美, Sugimoto Yumi). As a child, she is portrayed by Airi Yoshida (吉田 愛里, Yoshida Airi).

Bomper (ボンパー, Bonpā) is a pink radar robot created by Jum-bowhale from the Machine World, supporting the Go-ongers by creating their arsenal and performing maintenance on the Engines. Everything relating to Bomper involves the number 66. All of his dimensions are 66 cm, weighing 66 kg with a top speed of 66 km/h. Bomper also reveals that his name is an acronym for "Born-to Outerdimension and Mechanic × Pitcrew-type ENGINE-support Robot." As Bomper is from the Machine World, he ends his sentences with "Bom-Bom!" (ボンボン！, Bonbon!). Before settling on Bomper's pink-and-white color scheme, Jum-bowhale had originally designed him to be covered with colorful dots.

Bomper is voiced by Akiko Nakagawa (中川 亜紀子, Nakagawa Akiko).

The Go-ongers' technology revolves around the Engine Soul (炎神ソウル, Enjin Sōru), which is a chip-like item that holds the soul of an Engine, whose power they allow the Go-ongers to employ. When not in use, they are kept in the Engine Soul Holster (炎神ソウルホルスター, Enjin Sōru Horusutā).

• Go-Phone (ゴーフォン, Gōfon): The primary Go-ongers' transformation devices, installing a chip-like item called Change Souls (チェンジソウル, Chenji Sōru), based on the Engine Souls' design, and shouting "Let's Go-on!" to evoke the transformation. After their helmets materialize, they would say "'Met On!" to complete the transformation. By installing an Engine Soul in the Go-Phone, the Go-ongers can communicate with their Engine partners.
• Mantan Gun (マンタンガン, Mantan Gan, [Note 2]): A team sidearm that resembles a gas pump dispenser and has both a Gun Mode (ガンモード, Gan Mōdo) and a Rod Mode (ロッドモード, Roddo Mōdo). It requires an Engine Soul to operate. The Go-ongers can perform the Go-on Cannonball (ゴーオンキャノンボール, Gōon Kyanonbōru) with the Mantan Gun's Gun Mode and the Go-on Screw (ゴーオンスクリュー, Gōon Sukuryū) with the Mantan Gun's Rod Mode. A special Kyuyu Soul (キューユソウル, Kyūyu Sōru, [Note 3]) is developed by Renn to fire at an Engine Formation, re-energizing it. With Go-on Silver with the Wing Booster, Go-on Yellow can perform the Flower Cannonball (フラワーキャノンボール, Furawā Kyanonbōru) with the Mantan Gun's Gun Mode. When using the Kyoryu Disk as the Kyoryu Soul (恐竜ソウル, Kyōryū Souru), the Mantan Gun Rod Mode is able to extend over long distances.
• Road Saber (ロードサーベル, Rōdo Sāberu): Go-on Red's personal weapon. With it, he can execute the following attacks: Saber Straight (サーベルストレート, Sāberu Sutorēto), Saber Straight - Go-on Rendezvous (サーベルストレート・ゴーオンランデブー, Sāberu Sutorēto Gōon Randebū, with the Rocket Dagger), and Saber Spin Crash (サーベルスピンクラッシュ, Sāberu Supin Kurasshu).
• Garage Launcher (ガレージランチャー, Garēji Ranchā): Go-on Blue's personal weapon. With it, he can execute the following attacks: Launcher Starter (ランチャースターター, Ranchā Sutātā) and Jumping Attack (ジャンピングアタック, Janpingu Atakku).
• Racing Bullet (レーシングバレット, Rēshingu Baretto): Go-on Yellow's personal weapon. With it, she can execute the Bullet Crash (バレットクラッシュ, Baretto Kurasshu) attack.
• Highway Buster (ハイウェイバスター, Haiwei Basutā): The combination of the primary Go-ongers' Go-on Gear: the Road Saber, the Garage Launcher, and the Racing Bullet. When an Engine Soul is set in the weapon, the Racing Bullet is fired, unleashing the destructive power of the Soul's respective Engine on the target. The primary Go-ongers can perform the 1-2-3 Finish (ワンツースリーフィニッシュ, Wan Tsū Surī Finisshu) finisher by setting in three Engine Souls.
• Shift Changer (シフトチェンジャー, Shifuto Chenjā): The secondary Go-ongers' transformation devices, worn on the wrist. Its use is also dependent on the Change Souls.
• Bridge Axe (ブリッジアックス, Burijji Akkusu): Go-on Green's personal weapon. With it, he can execute the Axe Touring (アックスツーリング, Akkusu Tsūringu) attack.
• Cowl Laser (カウルレーザー, Kauru Rēzā): Go-on Black's personal weapon. With it, he can execute the Laser High-beam (レーザーハイビーム, Rēzā Haibīmu) attack.
• Junction Rifle (ジャンクションライフル, Jankushon Raifuru): The combination of the secondary Go-ongers' Go-on Gear: the Bridge Axe and the Cowl Laser. When an Engine Soul is set in the weapon, it fires two beams that combine into the destructive power of the Soul's respective Engine as it hits the target.
• Super Highway Buster (スーパーハイウェイバスター, Sūpā Haiwei Basutā): The combination of the Highway Buster and the Junction Rifle. To form the Super Highway Buster, the Road Saber portion of Highway Buster pushes the top cowl of the Junction Rifle forward while the blades of the Bridge Axe fold up. Like the Highway Buster, an Engine Soul-powered Racing Bullet is fired, stopping for a split second to take on Go-on Black's cowl. Once combined, they unleash the destructive power of the Soul's respective Engine on the target. With the Go-on Wings, the Go-ongers use their Engineken to perform the Super-Super Special Highway Buster (超超スペシャルハイウェイバスター, Chō Chō Supesharu Haiwei Basutā) finisher. With the Wing Boosters with Bus-on and Bearrv's Engine Souls, it can perform the Go-on Bond Special (ゴーオンキズナスペシャル, Gōon Kizuna Supesharu) finisher with Speedor's Engine Soul.
• Handle Blaster (ハンドルブラスター, Handoru Burasutā): The weapon which transforms into the handle of Engine-Oh G6, Engine-Oh G9 or Engine-Oh G12's cockpit. When using for Engine-Oh G6, Engine-Oh G9 or Engine-Oh G12's finisher, the Blaster Soul (ブラスターソウル, Burasutā Sōru) is set in it and it transforms into a Blaster Mode (ブラスターモード, Burasutā Mōdo) which uses as a gun sight and a trigger from a Handle Mode (ハンドルモード, Handoru Mōdo).
• Wing Trigger (ウイングトリガー, Uingu Torigā): The Go-on Wings' transformation devices, handheld and dependent on the Change Souls. The Wing Triggers serve as joysticks when the Go-on Wings pilot their Engines and anything thing else they attach to.
• Rocket Dagger (ロケットダガー, Roketto Dagā, [Note 4]): Go-on Gold and Go-on Silver's sword sidearms. The Rocket Dagger has six different attack modes, referred to as 'Mission #' by the weapon's voice.
  1. Burning Dagger (バーニングダガー, Bāningu Dagā): Go-on Gold's primary attack where the blade emits a torrent of flames.
  2. Freezing Dagger (フリージングダガー, Furījingu Dagā): Go-on Silver's primary attack where the blade creates a freezing wind that encases the opponent in ice.
  3. Lightning Dagger (ライトニングダガー, Raitoningu Dagā)
  4. Shining Dagger (シャイニングダガー, Shainingu Dagā): Jumping Dagger (ジャンピングダガー, Janpingu Dagā)
  5. Shooting Dagger (シューティングダガー, Shūtingu Dagā)
  6. Jet Dagger (ジェットダガー, Jetto Dagā): Allows the Go-on Wings to fly and perform the Dagger Acrobat (ダガーアクロバット, Dagā Akurobatto). The Rocket Dagger, when set to mode 6, says "Mission 6, Full Power" compared to the others.
• Wing Booster (ウイングブースター, Uingu Būsutā): The combination of the Wing Trigger and the Rocket Dagger, allowing Go-on Gold and Go-on Silver to perform a finisher by putting in any of their Engines' Engine Soul or with the Blaster Soul to perform the Engine-Oh G9 or Engine-Oh G12 finisher. With the Go-ongers, the Go-on Wings can perform the Hyper Cannon Ball (ハイパーキャノンボール, Haipā Kyanon Bōru) finisher.
• Kankanbar (カンカンバー, Kankanbā, [Note 5]): Developed by Renn to utilize the Ancient Engines' power, the weapon is modeled like a crossing gate and can hold up to two Engine Souls at once, with a Gun Mode and Rod Mode like the Mantan Guns. Its attack is the Crossing Dodonpa (クロッシングドドンパ, Kurosshingu Dodonpa) with T-line and K-line's Engine Souls shot out in the form of fireworks. Its finisher is the Crossing Stopper (クロッシングストッパー, Kurosshingu Sutoppā) with T-line and K-line's Engine Souls shot out in the form of a railway crossing. With the Mantan Gun's Rod Mode with Kishamoth's Engine Soul, it can perform the Double Cross Stopper (ダブルクロスストッパー, Daburu Kurosu Sutoppā) with T-line and K-line's Engine Souls.
• Kankan Mantan Gun (カンカンマンタンガン, Kankan Mantan Gan): A combination of the Kankanbar and the Mantan Gun that can hold up to three Engine Souls at once. Its finisher is the Kankan Kong Express (カンカンカンエクスプレス, Kan Kan Kan Ekusupuresu) with Kishamoth, T-line, and K-line's Engine Souls. There are also versions with Speedor, Bus-on,and Bearrv's Engine Souls, as well as Speedor, T-line and K-line's Engine Souls known as the Speedor Version (スピードルバージョン, Supīdoru Bājon).

The Go-ongers' mecha are the Engines (炎神, Enjin), denizens of Machine World with some of them pursuing the Barbaric Machine Clan Gaiark, choosing the Go-ongers as their partners to fight the Gaiark with them. While in the Human World, the Engines cannot exist in their full size and thus remove their Engine Souls to assume small forms called Engine Casts (炎神キャスト, Enjin Kyasuto) which are kept in the Engine Attache (炎神アタッシュ, Enjin Atasshu) until they are needed, resuming their true size on Earth for only 10 minutes, or suffer fatal rusting. But to fight, the Engines need the aid of humans to resume their true forms, with their hearts allowing the Engines to assume more powerful forms. Among Engines are two races, the large Gian Race (ジャイアン族, Jaian Zoku) that can combine with other Engines and the rare Wing Race (ウイング族, Uingu Zoku) that are masters of aerial combat. After the defeat of Yogoshimacritein, the Engines depart back to their homeworld until Speedor later returns to ask their partner to aid them again with the Gaiark President.

While as Engine Souls, they can communicate via any henshin device to give advice to the Go-ongers and the Go-on Wings, appearing as cartoony holograms with features like teeth, mouths, and other body parts not present as an Engine.

With the Origami, the Engines can execute the Modikara Cannonball (モヂカラキャノンボール, Mojikara Kyanonbōru) attack.

1. Engine Speedor (炎神スピードル, Enjin Supīdoru) is Go-on Red's partner, a hybrid between a condor and a racing car who ends his sentences with "Drrrr Drrrr!" (ドルドル！, Doru Doru!). When fully introducing himself, Speedor says, "Full tank of courage! The highway star! Engine Speedor" (勇気満タン、ハイウェイスター！炎神スピードル, Yūki mantan, haiwei sutā! Enjin Supīdoru). His engine pipes spout out flames in his Speedor Burst (スピードルバースト, Supīdoru Bāsuto) attack. His speed is unmatched and able to travel the length of Japan at full speed of 1000 km/h within three hours. Speedor can assume "Accel Full Throttle", a "semi-flying" mode where Speedor uses his talons for attacks, but he can only glide. He forms the upper body and head of Engine-Oh. In episode 36 of Kaizoku Sentai Gokaiger, it is revealed that Bearrv married Speedor, having a son, named Machalcon, that joins the Gokaigers as their Engine partner as well as a representation of the Go-ongers ultimate power for the Gokaigers. Speedor is voiced by Daisuke Namikawa (浪川 大輔, Namikawa Daisuke).[9] Namikawa previously voice N Ma, the main villain in Mahou Sentai Magiranger.
2. Engine Bus-on (炎神バスオン, Enjin Basuon) is Go-on Blue's partner, a hybrid between a lion and a bus who is the Edokko spirit of the group and ends his sentences with "Onon Ooonn!" (オンオン！, On'on!). He is able to hold 100 to 200 people in his body. When fully introducing himself, Bus-on says, "The chic and gallant safe ride! I'm Engine Bus-on" (粋でいなせな安全運転！炎神バスオンでい, Iki de inase na anzen unten! Enjin Basuon dei). He has brute strength and the Bus-on Missiles (バスオンミサイル, Basuon Misairu). He uses his destination sign as a secondary form of communication, changing it to say words such as "Stop" and "Fire!" He forms Engine-Oh's hip, legs, and Go-on Sword. Bus-on is voiced by Hisao Egawa (江川 央生, Egawa Hisao).[10]
3. Engine Bearrv (炎神ベアールＶ（ブイ）, Enjin Beārubui) is Go-on Yellow's partner, a gutsy hybrid between a bear and an 4WD truck who speaks Kansai-ben and ends her sentences with "Vvvvv Vvvv!" (ブイブイ！, Bui Bui!). When fully introducing herself, Bearrv says, "The loving and compassionate tough girl! I'm Engine Bearrv" (愛嬌と度胸のタフガール！炎神ベアールＶや, Aikyō to dokyō no tafu gāru!! Enjin Beārubui ya). Her spunky pep is due to her not being a picky eater, eating even enemy aircraft in her Bearr Attack (ベアールアタック, Beāru Atakku), and her technique is Bearr Press (ベアールプレス, Beāru Puresu) and V V Missiles (ブイブイミサイル, Bui Bui Misairu). She previously had romantic feelings for Jetras, though her impression of him as a strong person is ruined due to the Nigorl incident. She forms Engine-Oh's lower body and V-Shield. In episode 36 of Kaizoku Sentai Gokaiger, it is revealed that Bearrv married Speedor, having a son that joins the Gokaigers as their Engine partner as well as a representation of the Go-ongers ultimate power for the Gokaigers. Bearrv is voiced by Miki Inoue (井上 美紀, Inoue Miki).[11]
4. Engine Birca (炎神バルカ, Enjin Baruka) is Go-on Green's partner, an easy-going hybrid between an orca and a motorcycle with a fondness for foreign words, having used Spanish, Italian, French, English, and Mandarin Chinese terms so far. He ends his sentences with "Bar Barrrca!" (バルバルーカ！, Baru Barūka!). When fully introducing himself, Birca says, "The easygoing dreamer! I'm Engine Birca" (気楽なドリーマー！炎神バルカだよ, Kiraku na dorīmā! Enjin Baruka da yo). He is best at quick movements, though can be stubborn and rush into things without second thought. In battle, Birca uses his tail, the Bircutter (バルカッター, Barukattā) as a weapon. He forms a left arm in formations, bestowing them with his slicing abilities as well as part of Engine-Oh G12's right foot. Birca is voiced by Sōichirō Hoshi (保志 総一朗, Hoshi Sōichirō).[12]
5. Engine Gunpherd (炎神ガンパード, Enjin Ganpādo) is Go-on Black's partner, a lone-wolf hybrid between a German Shepherd and a police car who ends his sentences with "Ganga Gaaaan!" (ガンガガーン！, Ganga Gān!). When fully introducing himself, Gunpherd says, "The hard emergency dispatch! I'm Engine Gunpherd" (ハードな緊急出動！炎神ガンパードだ, Hādo na kinkyū shutsudō! Enjin Ganpādo da). Known as a sniper for his cannon nose, the Gunpherd Gun (ガンパードガン, Ganpādo Gan), Gunpherd pursues enemies in a hot chase with an equally burning sense of justice and precise sense of smell. He was a bit annoyed with Gunpei, chastising him once for having three stray bullets when they scrapped Speaker Banki. He forms a right arm in formations, bestowing them with his sniping abilities or part of Engine-Oh G12's left foot. Gunpherd is voiced by Kenji Hamada (浜田 賢二, Hamada Kenji).[13]
6. Engine Carrigator (炎神キャリゲーター, Enjin Kyarigētā) is a hybrid of an alligator and a semi-trailer truck with a samurai persona, able to carry two Engines on his back. He ends his sentences with "Geta Gaaaatoor!" (ゲタゲータ！, Geta Gēta!). When fully introducing himself, Carrigator says, "The giant star! I am Engine Carrigator" (ジャイアントな千両役者！炎神キャリゲーターでござる, Jaianto na senryō yakusha! Enjin Kyarigētā de gozaru). Being of the powerful and legendary Gian Clan, Carrigator can combine with any Engine without the need of a human partner. Though he came on Earth to fight the Gaiark, he teams up with Hanto and Gunpei to understand the concept of "partner". His only known flaws are that he takes much more time being charged than the other Engines, as well as being a voracious eater (in fact, his Engine Soul is slipped into his mouth). He forms the main body and head of GunBir-Oh and the feet of Engine-Oh G6, G9, and G12, as well as the helmet of Engine-Oh G6. Carrigator is voiced by Kyousei Tsukui (津久井 教生, Tsukui Kyōsei).[14]
7. Engine Toripter (炎神トリプター, Enjin Toriputā) is Go-on Gold's partner, a hybrid of a chicken (ニワトリ, niwatori) and a helicopter with a lively prankster personality who is a master in aerial dogfights while ending his sentences with "Batabata Bata!" (バタバタバタ！, Batabatabata!, an onomatopoeia of a helicopter's rotor blades whirring). When fully introducing himself, Toripter says, "Flying free. Tricky! I'm Engine Toripter" (縦横無尽トリッキー！俺っち炎神トリプター, Jūōmujin torikkī! Orecchi Enjin Toriputā). He is one of the two Wing Clan Engines who arrived to the Human World before Speedor and the others. With his rotor blades, he can perform the Toripter Batariot (トリプターバタリオット, Toriputā Batariotto), firing an endless supply of bullets from his turrets. He can form the right arm in formations as well as the right shoulder of Engine-Oh G9 and G12, with his tails forming "goggles" for Speedor. Toripter is voiced by Shizuka Ishikawa (石川 静, Ishikawa Shizuka).[15]
8. Engine Jetras (炎神ジェットラス, Enjin Jettorasu) is Go-on Silver's partner, a streamlined hybrid of a tiger (トラ, tora) and a fighter jet with a calm personality and ends his sentences with "Geeeeeeeeeeen!" (ギーン！, Gīn!, an onomatopoeia of a jet flying by at supersonic speeds and a pun on the Japanese word for silver). When fully introducing himself, Jetras says, "The silver air master! I'm Engine Jetras" (白銀のエアマスター！炎神ジェットラス, Shirogane no ea masutā! Enjin Jettorasu). He is one of the two Wing Clan Engines who arrived to the Human World before Speedor and the others. Jetras has the utmost respect for Jum-bowhale. With his wings and amazing offensive abilities, he can fire the Jetras Torahawk (ジェットラストラホーク, Jettorasu Torahōku) cruise missile from his mouth. He can execute the Jetras Phantom (ジェットラスファントム, Jettorasu Fantomu) attack where he creates clones to confuse the enemy. He can form the left arm when in formations as well as the left shoulder of Engine-Oh G9 and G12, with his rudder and elevators forming G9's helmet and part of G12's helmet. Jetras is voiced by Kiyotaka Furushima (古島 清孝, Furushima Kiyotaka).[16]
9. Engine Jum-bowhale (炎神ジャン・ボエール, Enjin Janboēru) is a hybrid between a baleen whale and a jumbo jet, with a French accent and ends his sentences with "Bowhaaaaaale!" (ボエール！, Boēru!). When fully introducing himself, Jum-bowhale says, "Everything about me is first class! It's Engine Jum-bowhale" (我輩、すべてがファーストクラス！炎神ジャン・ホエールであ～る, Wagahai, subete ga fāsuto kurasu! Enjin Janboēru de āru). He is the Go-on Wings' Instructor and a veteran fighter who leads the Wing Engines, forming the main body of Seiku-Oh and the back of Engine-Oh G9 and G12. Jum-bowhale can execute the Bowhale Beam (ボエールビーム, Boēru Bīmu) attack where he sprays water from his back, as well as assume Jet Mode (ジェットモード, Jetto Mōdo) for highspeed tackle attacks. In his Soul form, he has a captain's hat and his moustache is more visible. Jum-bowhale is voiced by Tomomichi Nishimura (西村 知道, Nishimura Tomomichi).[17]
10. Engine Kishamoth (炎神キシャモス, Enjin Kishamosu) is a hybrid between a mammoth and a steam locomotive, one of the Ancient Engines (古代炎神, Kodai Enjin) that battled the Horonderthal before entering a deep sleep as the "Golden Dragon", which is the train formation that the Ancient Engines formed with Kishamoth in the lead. Because he and the other Ancient Engines came to the Human World during the time of the dinosaurs, which was called Dino World (ダイナワールド, Daina Wārudo) at the time, they are unable to speak the human languages like the modern Engines. However, Kishamoth has a peaceful nature in spite of trying not to sound rough, and he easily trusts both the humans and the modern Engines. The onomatopoeic description of Kishamoth's trumpeting is "Pao pao!!" (パオパオー!, Pao Paō!). When fully introducing himself, his trumpets are translated as "Departing from ancient times, full speed ahead. Engine Kishamoth" (古代発で出発進行！炎神 キシャモスだよ, Kodai hatsu de shuppatsu shinkō! Enjin Kishamosu da yo). His nose spouts out freezing mist in his Ice Age Express (アイスエイジエクスプレス, Aisu Eiji Ekusupuresu) attack. He can break his body to either form the head, torso, and arms of Kyoretsu-Oh or form the hip armor, "face armor" for Buson, and part of the feet of Engine-Oh G12, with its head forming part of G12's helmet.[18]
11. Engine T-line (炎神ティライン, Enjin Tirain) is a hybrid between the Tyrannosaurus rex and the Shinkansen, one of the Ancient Engines who has an intense hatred for the Savage Machine Clans. He is the more primitive of the three. The onomatopoeic description of T-line's roars is "Gao gao!!" (ガオガオー!, Gao Gaō!). When full introducing himself, his roars are translated as "Going up. Engine of wishes, T-line" (上るぜ！のぞみの炎神ティライン, Noboru ze! Nozomi no Enjin Tirain). While forming the middle car of their train formation, T-line forms the right leg of Kyoretsu-Oh and right arm of Engine-Oh G12.[19]
12. Engine K-line (炎神ケライン, Enjin Kerain) is a hybrid between the Triceratops and the Shinkansen, one of the Ancient Engines whose talent is in charging, breaking through anything with his three horns. The onomatopoeic description of K-line's roars is "Gyao gyao!!" (ギャオギャオー!, Gyao Gyaō!). When fully introducing himself, his roars are translated as "Going down. Engine of Light, K-line" (下るよ！ひかりの炎神ケライン, Kudaru yo! Hikari" no Enjin Kerain). While he forms the back car of the Engines' train formation, K-line also forms the left leg of Kyoretsu-Oh and left arm of Engine-Oh G12.[20]

The Go-ongers' four Engine robots and Go-Roader each have a role call phrase and a nickname which they say when fully introducing themselves, before the group says "Invincibility's Thundering Sound! Go-on All-Stars!" (無敵の音を轟かす！ゴーオンオールスターズ, Muteki no Oto o Todorokasu! Gōon Ōru Sutāzu). Four Engine robots and Go-Roader can perform co-operative attacks such as the Go-on Kick (ゴーオンキック, Gōon Kikku) and the Go-on Punch (ゴーオンパンチ, Gōon Panchi).

Engine Gattai Engine-Oh (炎神合体エンジンオー, Enjin Gattai Enjin'ō) is the Go-ongers' primary robot, referred to as the "Giant King of Engines" (巨大なる炎神の王, Kyodai naru Enjin no Ō). Its finisher is the Go-on Grand Prix (ゴーオングランプリ, Gōon Guran Puri) where Engine-Oh charges the enemy at full speed with its Go-on Sword (ゴーオンソード, Gōon Sōdo), landing the deathblow as it moves past. It has the V Shield (Ｖシールド, Bui Shīrudo). With GunBir-Oh and Seiku-Oh, it can perform the following finishers: Go-onger Storm (ゴーオンジャーストーム, Gōonjā Sutōmu), Triple Punch (トリプルパンチ, Toripuru Panchi), and Grand Prix Festival (グランプリフェスティバル, Guranpuri Fesutibaru).[21] It is composed primarily of Speedor, Bus-on, and Bearrv, but can receive power-ups by performing Engine Armaments (炎神武装, Enjin Busō):

• With Birca, Engine-Oh becomes Engine-Oh Birca (エンジンオーバルカ, Enjin'ō Baruka) where it uses the Bircutter in its Bircutter Slash (バルカッタースラッシュ, Barukattā Surasshu) finisher.[22]
• With Gunpherd, Engine-Oh becomes Engine-Oh Gunpherd (エンジンオーガンパード, Enjin'ō Ganpādo) where it uses the Gunpherd Gun in its Gunpherd Gunfire (ガンパードガンファイヤー, Ganpādo Ganfaiyā) finisher.[23]
• With Jetras and Toripter at the same time, Engine-Oh becomes Engine-Oh Jetripter (エンジンオージェットリプター, Enjin'ō Jettoriputā) where its right arm is used as the Toripter Rotor (トリプターローター, Toriputā Rōtā) for offensive/defensive attacks while its left arm is used as the Jetras Bow (ジェットラスボウ, Jettorasu Bō) for the Jetori Bullseye (ジェットリブルズアイ, Jettori Buruzuai) finisher.[24]
• When armed with Jetras only, Engine-Oh becomes Engine-Oh Jetras (エンジンオージェットラス, Enjin'ō Jettorasu). Its finisher is the Go-On Bullseye (ゴーオンブルズアイ, Gōon Burūzuai) where it fires the Go-on Sword with Jetras' bow.

Engine Gattai GunBir-Oh (炎神合体ガンバルオー, Enjin Gattai Ganbaruō) is the Go-ongers' secondary robot formed from Birca and Gunpherd combining with Carrigator, referred to as "Another King of Engines" (さらなる炎神の王, Sara naru Enjin no Ō). Its attacks are the Bircutter Storm (バルカッターストーム, Barukattā Sutōmu) and Bircutter Wrist Return (バルカッター小手返し, Barukattā Kote Gaeshi). Its finisher is the GunBir Grand Prix (ガンバルグランプリ, Ganbaru Guran Puri), for which Carrigator says "Herculean Strength Unrestricted" (剛力無制限, Gōriki Museigen), then performs a 3-fold attack with its Engines. GunBir-Oh can also execute the Gunpherd Gun and Bircutter Slash. With Engine-Oh and Seiku-Oh, it can perform the following finishers: Go-onger Storm, Triple Punch, and Grand Prix Festival.[25]

• With Toripter, GunBir-Oh becomes GunBir-Oh Toripter (ガンバルオートリプター, Ganbaruō Toriputā) where it uses the Gunpherd Gun and Toripter's turrets in its Toripgun Batariot (トリプガンバタリオット, Toripugan Batariotto) finisher.
• With Jetras, GunBir-Oh becomes GunBir-Oh Jetras (ガンバルオージェットラス, Ganbaruō Jettorasu) where it uses Jetras' wings and the Bircutter in its Trabircutter Slash (トラバルカッタースラッシュ, Torabarukattā Surasshu) finisher.

G6 Formation Engine Gattai Engine-Oh G6 (G６フォーメーション炎神合体 エンジンオーG６, Jī Shikkusu Fōmēshon Enjin Gattai Enjin'ō Jī Shikkusu) is the combination of Engine-Oh and GunBir-Oh, created when Renn modified the GunBir-Oh components for a new G6 Formation based on Carrigator's fusion ability and Bomper's knowledge of Engines. The "G6" stands for "Go-onger 6." Its attack is the G6 Kick (G６キック, Jī Shikkusu Kikku) and its finisher is the G6 Grand Prix (G６グランプリ, Jī Shikkusu Guran Puri) where it fires all of its weapons in energy form at the enemy.[26]

Engine Gattai Seiku-Oh (炎神合体セイクウオー, Enjin Gattai Seikūō, [Note 6]) is the combination of the winged Engines Toripter, Jetras, and Jum-bowhale, referred to as the "Sky Punching Aerial King" (空を制する天空の王, Sora o Seisuru Tenkū no Ō). Its attacks are the Toripcutter (トリプカッター, Toripukattā), Jetras Boomerang (ジェットラスブーメラン, Jettorasu Būmeran), Jetori Turbulence (ジェットリタービュランス, Jettori Tābyuransu), and Seiku Sonic (セイクウソニック, Seikū Sonikku). Its finisher is the Seiku Impulse (セイクウインパルス, Seikū Inparusu). With Engine-Oh and GunBir-Oh, it can perform the following finishers: Go-onger Storm, Triple Punch, and Grand Prix Festival.[27]

• With Birca, Seiku-Oh becomes Seiku-Oh Birca (セイクウオーバルカ, Seikūō Baruka) where it uses the Bircutter and Jetras' fangs in its Birtras Torahawk (バルトラストラホーク, Barutorasu Torahōku) finisher.
• With Gunpherd, Seiku-Oh becomes Seiku-Oh Gunpherd (セイクウオーガンパード, Seikūō Ganpādo) where it uses Toripter's turrets and the Gunpherd Gun in its Guntori Gunfire (ガントリーガンファイヤー, Gantorī Ganfaiyā).

G9 Formation Engine Gattai Engine-Oh G9 (G９フォーメーション炎神合体 エンジンオーG９, Jī Nain Fōmēshon Enjin Gattai Enjin'ō Jī Nain) is the combination of Engine-Oh, GunBir-Oh and Seiku-Oh, which is referred as the "Air and Earth Reigning King" (空と大地に君臨する王, Sora to Daichi ni Kunrin suru Ō), achieved after Bomper and Jum-bowhale remodel the Wing Engine casts. It was used once the Go-on Wings finally join the Go-ongers. Its finisher is the G9 Grand Prix (G９グランプリ, Jī Nain Guran Puri), a stronger version of the G6 Grand Prix.[28]

Engine Gattai Kyoretsu-Oh (炎神合体キョウレツオー, Enjin Gattai Kyōretsuō, [Note 7]) is the combination of the three Ancient Engines, referred to as the "Powerful King of Trains" (強大な列車の王, Kyōdai na Ressha no Ō), piloted by Go-on Red, who apparently understands them. Extremely powerful, Kyorestu-Oh uses Kishamoth's ability to shoot out a gust of cold air from his trunk, which is cold enough to cool magma. Its attacks are the Railway Chop (電車道チョップ, Denshamichi Choppu), Dinosaur Kick (ダイナソーキック, Dainasō Kikku), Kyoretsu Dino Bite (キョウレツダイナバイト, Kyōretsu Daina Baito), and KishamoSteam (キシャモスチーム, Kishamosuchīmu). Its finisher is the Kyoretsu Express (キョウレツエクスプレス, Kyōretsu Ekusupuresu) where it uses the freezing mist to execute a burning-chop attack.[29]

G12 Formation Engine Gattai Engine-Oh G12 (G12フォーメーション炎神合体 エンジンオーG12, Jī Tuerubu Fōmēshon Enjin Gattai Enjin'ō Jī Tuerubu) is the combination of all 12 Engines, the largest Engine combination made with a height of 93m and a weight of 12000t referred to as the "Ultimate King Who Triumphs Over Evil" (全ての悪を制する究極の王, Subete no Aku o Seisuru Kyūkyoku no Ō). Due to its massive weight, the formation lasts for a few minutes. Its attacks are the G12 Punch (G12パンチ, Jī Tuerubu Panchi) and G12 Kick (G12キック, Jī Tuerubu Kikku), while its initial finisher is the G12 Grand Prix (G12グランプリ, Jī Tuerubu Guran Puri) where it generates aura versions of Engine-Oh, GunBir-Oh, Seiku-Oh and Kyoretsu-Oh to attack the enemy before charging while generating an incinerating aura. G12's ultimate attack is the G12 Final Grand Prix (G12ファイナルグランプリ, Jī Tuerubu Fainaru Guran Puri) where it temporarily transforms into a massive bird of flame that bursts through the opponent. With SaiDaiGekiRinTohja, it can perform the Engine Beast Grand Prix (炎神ビーストグランプリ, Enjin Bīsuto Guran Puri) finisher.[30]

Miracle Engine Gattai Engine-Oh G7 (ミラクル炎神合体 エンジンオーG7, Mirakuru Enjin Gattai Enjin'ō Jī Sebun) is the combination of the seven Engine partners of the Go-ongers and Go-on Wings. Its finisher is the 10 Years Grand Prix (10 Years グランプリ, Ten Iyāzu Guran Puri).

Armored Wheel Go-Roader GT (装甲車輪ゴローダーGＴ, Sōkō Sharin Gorōdā Jī Tī, [Note 8]) is the wheel-like robot referred to as the "Running Wheel of Justice" (爆走する正義の車輪, Bakusō suru Seigi no Sharin) created by Hiroto and Jum-bowhale, appearing as a palm-sized wheel and in the development stage due to the defective Power Souls (パワーソウル, Pawā Sōru) created by Hiroto to activate it, causing the Go-Roader to go on a rampage. However, with the Tokon Soul (トーコンソウル, Tōkon Sōru, [Note 9]) developed by Renn, Go-Roader can enlarge and can assume a humanoid Action Mode (アクションモード, Akushon Mōdo) as well as change into a Wheel Mode (ホイールモード, Hoīru Mōdo) to execute the Go-Roader Strike (ゴローダーストライク, Gorōdā Sutoraiku) attack with Engine-Oh G9 or Engine-Oh G12's energy. Action Mode's attack is the Go-Roader Kick (ゴローダーキック, Gorōdā Kikku). Another feature of the Go-Roader is its ability to house an Engine Soul to assume a human-sized Action Mode with the mind of the very Engine controlling it. However, staying too long in Action Mode exhausts the Engine's energy over a period of time. A human-sized Wheel Mode can perform the Go-Roader Attack (ゴローダーアタック, Gorōdā Attaku) finisher.[31]

The Samurai Formation 23 (サムライフォーメーション23, Samurai Fōmēshon Tuentisurī) is a formation between Samuraihaoh and Engineoh G12 in Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!. In this form, Shinkenoh, Daikaioh, Mougyudaioh, Kyoretsu-Oh and Engine-Oh G9 use the IkaTenku Buster to perform the Samurai Engine Super Grand Release (侍・炎神・スーパー大開砲, Samurai Enjin Sūpā Daikaihō) finisher.

Originally thought to be the last of the Gaiark, the three Pollution Ministers end up on Earth and decide to pollute it to serve as an ideal paradise for them. They based themselves at Hellgailles Palace (ヘルガイユ宮殿, Herugaiyu Kyūden), located on an isolated island in the middle of the sea. Powering the entire place is the Deus Haguru Magear (デウス・ハグル・マギア, Deusu Haguru Magia), a big gear in their command chamber which is an inexhaustible energy source that Yogostein brought with him from Machine World. The gear's power is used Yogoshimacritein to create an army of Barbaric Dohma until the primary Go-ongers break it, causing Hellgailles Palace to self-destruct and sink into the sea. During the events of Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!, though revived, the Pollution Ministers want nothing to do with Batcheed's plan and spend their time at Genta's Gold Zushi stand before running off back into bottom of the Sanzu River. The Ministers also make an appearance in the Kaizoku Sentai Gokaiger vs. Space Sheriff Gavan: The Movie as captives in the Makuu Prison for giving up their lives of villainy before being released by the Gokaigers.

Water Pollution Minister Kegalesia (害水大臣ケガレシア, Gaisui Daijin Kegareshia, 1-49) [Note 11] is the human-looking general with the Kegastick (ケガスティック, Kegasutikku) who leads the Gaiark's sea-based Barbaric Machine Beasts. She has artificial human-like skin that regenerates and shoots steam from the projections on her back armor if she is in a foul mood, and the handle on her head cuts off this leakage. She ends her sentences with "Ojaru", is a heavy drinker who hates to be called "Old Lady", sometimes enlarging from the anger being too much to fume out. While under the guise of Rena Kegareshi (汚石 冷奈, Kegareshi Rena), Kegalesia develops a vendetta against Hant due to his falling in love with her guise and calling her loving things, like "pure," which are offensive to members of the Gaiark. It was this taboo that she could never fall in love with Nigorl, as his ideas were the opposite of the Gaiark's. While the Go-ongers were trapped in Samurai World, Kegalesia accidentally separates her Kegalesia Soul (ケガレシアソウル, Kegareshia Sōru) from her body, with her soul set into Bomper by the other Ministers to convert the robot into Bompelesia (ボンパレシア, Bonpareshia) so they can take advantage of the situation by setting a trap. However, Bomper manages to regain control and ejects the Kegalesia Soul prior to being reinstalled back in her body. She occasionally joined Saki and Miu in the 3-girl idol group G3 Princess, though the second time ended with her enlarging and being knocked into the distance by Engine-Oh G12. When Yogoshimacritein arrives, Kegalesia is reduced to a mere henchman forced to obey him. She is annoyed when Yogoshimacritein uses her and Kitaneidas as human shields against the Go-onger's attacks, seeing him for what he is and his methods not to her liking. As an act of defiance against the dictator, she helps in destroying the Infinite Wastebin before she was heavily damaged by Yogoshimacritein. She gives the location of the Deus Haguru Magear to Go-on Red, Blue, and Yellow before shutting down.

During the events of Shinkenger vs. Go-Onger, she is the one who reveals the location of Batcheed's Batchirium Plant to the heroes.

Due to her nature as a Water Pollution branch member, she can execute Water Pollution Fusion (害水合身, Gaisui Gasshin) with any member of the same branch, boosting up their power as a result.[32] Before entering battle, Kelgalesia says, "The muddied and fetid waters! I am Water Pollution Minister Kegalesia!" (濁り腐った水よ！　わらわ、害水大臣ケガレシア, Nigori kutta mizu yo! Warawa, Gaisui Daijin Kegareshia). After transforming into her true form as part of the one-time only G3 Princess idol group, Kelgalesia says, "Love me or Regret it!! Kegalesia" (惚れなきゃ後悔！！ケガレシア, Horenakya Kōkai!! Kegareshia). As part of G3 Princess with Go-on Yellow and Silver, she performs Princess Cannonball (プリンセスキャノンボール, Purinsesu Kyanonbōru), after performing G3 Triangle (Ｇ３トライアングル, Jī Surī Toraianguru) which passes the ball made by them.

She reappears in Kaizoku Sentai Gokaiger the Movie: The Flying Ghost Ship along with Saki and Miu.

Kegalesia is portrayed by Nao Oikawa (及川 奈央, Oikawa Nao).

Air Pollution Minister Kitaneidas (害気大臣キタネイダス, Gaiki Daijin Kitaneidasu, 1-49) [Note 12] leads the Gaiark's sky-based Barbaric Machine Beasts and uses the Kitaneibar (キタネイバー, Kitaneibā) as his weapon and can turn himself into smog as well as execute his Air Pollution Attack (害気アタック, Gaiki Attaku). He is the best card player among the three ministers and ends his sentences with "Zoyo". He experimented with Bikkurium's potent abilities prior to using it on Barbaric Machine Beasts. Kitaneidas is reduced to a mere henchman when Yogoshimacritein arrives and is forced to obey him. He is agitated when Yogoshimacritein uses him as a human shield against the Go-ongers, and as a final act, he destroys the Infinite Wastebin before he is forced to shut down by Yogoshimacritein.[33]

Before entering battle, Kitaneidas says, "The blackened skies! I am Air Pollution Minister Kitaneidas!" (黒く染まった空気よ！　私、害気大臣キタネイダス, Kuroku somatta kūki yo! Watashi, Gaiki Daijin Kitaneidasu).

Kitaneidas is voiced by Mitsuaki Madono (真殿 光昭, Madono Mitsuaki).

Land Pollution Minister Yogostein (害地大臣ヨゴシュタイン, Gaichi Daijin Yogoshutain, 1-36) [Note 13], his full name being Baron Yogorex de Stein (バロン・ヨゴレックス・ド・シュタイン, Baron Yogorekkusu do Shutain), is the golden-armored general who leads the Gaiark's land-based Barbaric Machine Beasts, using the Yogospear (ヨゴシュピア, Yogoshupia) as his weapon and ends his sentences with "Nari". Though a serious sort, he rejoiced to see his subordinate Hiramechimedes arrives to aid him in destroying the Go-ongers. Despite continuous failure, his faith and esteem he felt for his vice-minister never faded as he showed concern for Hiramechimedes' well-being and has been in a state of mourning since his death before leaving Hellgailles Palace to clear his head and find himself. By the time he returned, Yogostein was more rage-filled and decides to rely on his own power, creating Hammer Banki to destroy the world rather than remake it into an ideal environment for the Gaiark. It was after his creation was destroyed that Yogostein saw the error of his ways as the other Ministers forgive him for his reckless action. Prior to the events of the movie, Yogostein developed the Savage Machine Beast Recycle program, using his spear to remove the Ugatz's Souls from their bodies to revive the Savage Machine Beasts in a Minister team attempt to tear down the dimensional barrier. However, the plan failed and Yogostein sets up a new one with the accidentally created Kegalesia Soul. Soon after, Yogostein resumes acting on his own when he begins a new project to unearth the Horonderthal from his rest, setting up a chain of events that would not only dispose of Go-on Red, but being able to upgrade himself as the new Horonderthal King to rust the entire city. However, his upgrade is canceled by Engine-Oh G12 before being destroyed by the revived Go-on Red in a one-on-one duel.[33]

When entering battle alongside the other pollution Ministers, Yogostein says, "The Dried Cracked Ground! I am Land Pollution Minister Yogostein" (乾きひび割れた土よ！　我、害地大臣ヨゴシュタイン, Kawaki hibiwareta tsuchi yo! Ware, Gaichi Daijin Yogoshutain), while when attacking with other Land Pollution Ministry members he says, "The Earth soiled by a hateful guy, Land Pollution Minister Yogostein!" (大地を汚す憎い奴・害地大臣ヨゴシュタインなり, Daichi o yogosu nikui yatsu, Gaichi Daijin Yogoshutain nari). He performs Yogospear Grind (ヨゴシュピアグラエンド, Yogoshupia Guraendo) with the Yogospear. With Hiramechimedes and Happa Banki, they can perform the Land Pollution Gattai DoDoDo Ground (害地合体ドドドグラウンド, Gaichi Gattai Dododo Guraundo).

Yogostein is voiced by Kiyoyuki Yanada (梁田 清之, Yanada Kiyoyuki).

Land Pollution Vice-Minister Hiramechimedes (害地副大臣ヒラメキメデス, Gaichi Fukudaijin Hiramekimedesu, 15-23) [Note 14] is Yogostein's subordinate and the Gaiark's top tactical genius, a more serious threat than the Pollution Ministers. Whenever inspired with a plan, the 3 light bulbs on his head flash as he says "Pok-Pok-Ping!" (ポク・ポク・ピーン!, Poku-Poku-Pīn!) with the sextant and protractor on his chestplate indicating the plan's greatness. Originally a second-rate inventor of many of the Gaiark group's arsenal, he plotted to assassinate Yogostein to become the new Land Pollution Minister and be somebody. However, after seeing his brilliant mind recognized by Yogostein as he awards him with the yardstick-stylized sword Hacalibur (ハカリバー, Hakaribā) and his title on the day the Gaiark attack Machine World, Hiramechimedes devoted himself to his master's cause without question as he became feared by the Engines, making them frightened husks of their former selves in his numerous victories which they eventually overcame. However, on the day the Gaiark were expelled from Machine World, Hiramechimedes mysteriously disappeared during the fight only to resurface months later on the Human World to serve under Yogostein again after settling some loose ends with the Wing Engines as he thought he had handled, only to be once more pursued by them and the Go-on Wings.

Eventually, Hiramechimedes, along with Yogostein and Bōseki Banki, stages his apparent banishment from Hellgailles palace as part of a plan to deceive the Go-ongers and kill Go-on Gold. However the plan goes wrong yet again with the arrival of Engine-Oh G9 and Hiramechimedes refuses to return to Yogostein out of shame, spending long days of calculation for a means to kill the Go-ongers. After a vain attempt to destroy the Go-on teams, Hiramechimedes finally finds the answer he had been looking for: to beat the Go-ongers at their own game with raw power rather than with intellect. To that end he sneaks back into Hellgailles Palace and, in spite of Yogostein's pleas, infuses himself with a hundred times the Bikkurium amount that a Savage Machine Beast needs for "Industrial Revolution". In consequence, the stress of this destroyed Hiramechimedes' mind as he upgrades into a more powerful and insane babbling form called Detaramedes (デタラメデス, Detaramedesu, 23). Though he almost defeats Engine-Oh G9 after executing "Big Industrial Revolution", Detaramedes' downfall comes from Sōsuke's reckless refusal to give up. In the end, Go-on Red scraps Detaramedes with only the Hacalibur remaining for Yogostein to pick up.

However, while the Go-ongers visit a shrine in the woods, they encounter Hiramechimedes' ghost, referring to himself as Urameshimedes (ウラメシメデス, Urameshimedesu, 24), as his malice towards the Go-ongers kept him from passing on. Unable to regain physical form, Urameshimedes made a detour to Samurai World to recruit the aid of Bakki to help him by physically harming the Go-ongers in return to allow him to destroy the forest. But when everything didn't work out as planned, Urameshimedes possesses Bakki's body as Hirameki Bakki (ヒラメキ伐鬼, Hirameki Bakki, 24) and enlarges it to kill the Go-ongers. However, the Go-on teams manage to use a G9 Grand Prix laced with salt on the two so the attack would not only kill Bakki, but exorcise Hiramechimedes in the process.

Hiramechimedes has a cameo appearance during the closing credits of Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!! where he drowns in Sanzu River while the other three ministers sink to its bottom.

His attacks have a calculus theme from his Pi Beam (円周率パイビーム, Enshūritsu Pai Bīmu) to his sword-based Equilateral Triangle Slash (正三角形斬り, Seisankakkei Giri), Isosceles Right Triangle Slash (直角二等辺三角形斬り, Chokkaku Nitōhen Sankakkei Giri), Acute Triangle Slash (鋭角三角形斬り, Eikaku Sankakkei Giri), and Hirameki Kill-Factor: Pythagorean Theorem (ヒラメキ殺法・三平方の定理, Hirameki Sappō: Sanheihō no Teiri) attacks. As Detaramedes, his uses a variety of attacks with a miscalculation theme such as Hissatsu: Root 3 - Base ÷ Diameter = 950000 (必殺・ルート３－底辺÷直径＝９５００００, Hissatsu: Rūto San hiku Teihen waru Chokkei wa Kyūjūgoman), 10 - 4 = 200 (１０－４＝２００, Jū hiku Yon wa Nihyaku), 6 + 9 = 500 (６＋９＝５００, Roku tasu Kyū wa Gohyaku), Detarame Kill-Factor: Bikkurium Beam (デタラメ殺法・ビックリウム光線, Detarame Sappō: Bikkuriumu Kōsen), Detarame Kill-Factor: Brain Freeze Slash (デタラメ殺法・思考停止斬り, Detarame Sappō: Shikō Teishi Giri), and Detarame Kick-Punch-Chop-Slash (デタラメキックパンチチョップ斬り, Detarame Kikku Panchi Choppu Giri). Before entering battle, Hiramechimedes says, "Pok-Pok-Ping! and I have a flash. Land Pollution Vice-Minister Hiramechimedes!" (ポク・ポク・ピーン！とひらめくは、害地副大臣ヒラメキメデスです, Poku-Poku-Pīn! to hirameku wa, Gaichi Fuku Daijin Hiramekimedesu desu).

In the It's a Seminar! Everyone GO-ON!! special DVD it is reveal that Hiramechimedes has an older, cross dressing brother named Kokorootomedes (ココロオトメデス, Kokorootomedesu, [Note 15]). He has a very flamboyant in personality and often asserts his femininity, seeing himself as a maiden. Armed with the Kiradecolibur (キラデコリバー, Kiradekoribā) that is a decorated version of Hiramechimedes' Hacalibur, Kokorootomedes challenges Go-on Red to avenge his younger brother. At first, Kokorootomedes uses his feminine wiles and his two attacks on his opponent, Kokorootomedes' Fashion Check Attack (ココロオトメデスのファッションチェック攻撃, Kokorootomedesu no Fasshon Chekku Kōgeki) and Lovely Sparkling Pentagon, Star Heart Slash (恋のキラキラ五角形お星様ハート斬り, Koi no Kirakira Gokakkei, Ohoshi-sama Hāto Giri). But once man-handled by Go-on Red, Kokorootomedes upgrades into a powerful berserker form, becoming a Yakuza-type in personality with his crazed Hissatsu: Ruless Battle (必殺・定規なき戦い, Hissatsu: Jōgi Naki Tatakai) attack that lets him fight dirty. In the end, he is scrapped by Go-on Red using the Kankanbar Mantangun on him, lamenting on his desire before rethinking that it wasn't well worth his death.

Both Hiramechimedes and Kokorootomedes is voiced by Kazuya Nakai.

Crime Minister Yogoshimacritein (総裏大臣ヨゴシマクリタイン, Sōridaijin Yogoshimakuritain, 47-50) [Note 16] is the black/gold armored Insurgant Highness (デンカノボウトウ, Denka no Bōtō) that wields a double-ended Kanabō-like weapon and Yogostein's father, ending his sentences with "Narina". Being the total opposite of his son and most ruthless of the Gaiark, Yogoshimacritein desired to rule all the Braneworlds, playing part in forcing the Gian Race Engines into the verge of extinction and oversaw the destruction of the three Braneworlds by Kireizky. After Kireizky's death, Yogoshimacritein uses his fallen minion's Bottomless Wastebin to enter the Human World, using it as a means to feed from in order for him to use his signature inhereditary attack Justice Dissolution (正義解散, Seigi Kaisan), which can convert those it hits into wavelengths as long as the Deus Haguru Magear is active. He uses it to take out Hant, Gunpei, and the Go-on Wings, along with their Engine partners, Carrigator, Jum-bowhale, and the ancient Engines. His other attacks are Puppet Regime (傀儡傀儡政権, Kugutsu Kairaiseiken) which can turn his subordinates into his puppets, Ration Provision Bullet (定額給付弾, Teigaku Kyūfu Dan). He uses his staff to unleashes his most powerful attacks: Enforcing Vote (強行採決, Kyōkō Saiketsu) and Closing Despotic Proclamation: Yogoshimanifesto Break (最終独裁宣言・ヨゴシマニフェストブレイク, Saishū Dokusai Sengen: Yogoshimanifesuto Bureiku). Eventually, Yogoshimacritein reveals to Kegalesia and Kitaneidas that he never cared for his surbordinates and will sacrifice them as long as it is to accomplish their plan. After losing the Infinite Wastebin to the ministers, Yogoshimacritein fatally damages them both before making his way to the Deus Haguru Magear to power himself up until he is trapped in the Bikkurium chamber as the gear is destroyed, causing the entire Hellgailles Palace to collapse around him. However, Yogoshimacritein reconstructs himself from his gears and attempts to destroy the city until he is halted by Hant, Gunpei, and the Go-on Wings. Once the primary Go-ongers join the fray, Yogoshimacritein enlarges himself in a process called Third Industrial Revolution (第三次産業革命, Daisanji Sangyō Kakumei) and battles Engine-Oh G12 until he is finally destroyed by the G12 Final Grand Prix attack.

Yogoshimacritein is voiced by Kiyoyuki Yanada, who also voices Yogostein.

Cleaning Minister Kireizky (掃治大臣キレイズキー, Sōji Daijin Kireizukī, 42-44) [Note 17] is one of the Gaiark's ministers, who "cleans" the slate of Braneworlds he has visited, destroying the Sound World, the Magic World, and the Prism World to acquire a special energy called Dokkirium (ドッキリウム, Dokkiriumu). Arriving in the Human World, Kireizky intervened during Engine-Oh G9's fight with Bin Banki before formally introducing himself. Kireizky is armed with Seven Cleaning Tools (オソウジ七つ道具, Osōji Nanatsu Dōgu) such as Duster Blade (ハタキブレード, Hataki Burēdo) with which he can execute the Dust Trash (ホコリトラッシュ, Hokori Torasshu), Tying Sleeves (たすき掛け, Tasuki Gake), and Round Moon Slash (円月斬り, Engetsu Giri) attacks. His other weapons are Broom Shotgun (ホウキショットガン, Hōki Shottogan), Anti-Soul Rag (アンチソウルゾーキン, Anchi Sōru Zōkin) that can absorb Engine-Soul based attacks and send them back to knock them out or be wrung into the Rag Grenade (ゾウキングレネード, Zōkin Gurenēdo), the Dustpan Shield (チリトリシールド, Chiritori Shīrudo), and Cotton Swab Kunai (メンボークナイ, Menbō Kunai). His sixth weapon, the Bottomless Wastebin (ムゲンゴミバコ, Mugen Gomibako), allows him to manipulate space itself from evading an enemy attack to sending them far away with Vacuum Full Power (バキュームフルパワー, Bakyūmu Furu Pawā). But once losing the wastebin, Kireizky swallows the Dokkirium he gather to undergo Super Industrial Revolution (超産業革命, Chōsangyō Kakumei) before using the strongest of his seven weapons, the Bucket Bazooka (バケツバズーカ, Baketsu Bazūka). Though he overpowered the Go-ongers, the tables turn when the entire team is reassembled and Kireizky is finally scrapped by Engine-Oh G12. However, his Wastebin ended up at the Hellgailles Palace, still active as Yogoshimacritein and Chirakasonne emerge from it. His name is from the Japanese word for "tidiness" (綺麗好き, kireizuki).

Kireizky is voiced by Eiji Takemoto (竹本 英史, Takemoto Eiji), previously the voice of Rouki in Hyakujuu Sentai Gaoranger.

Danger Cabinet-Director Chirakasonne (危官房長官チラカソーネ, Kikanbō Chōkan Chirakasōne, 47) [Note 18] is Yogoshimacritein's Boiler-based right-hand man in bulky armor who ends his sentence with "nonne". He is a user of kenpō named Natural Litter Constitution (天地羅苛死憲法, Tenchirakashi Kenpō) and his trademark attack is the Natural Reversal (天地逆転, Tenchi Gyakuten), ingesting the energy attack of an opponent and reflecting back. His other attack, Natural Unnecessariness (天地無用, Tenchi Muyō), produces a shockwave that levels buildings to the ground. Once the Go-ongers found a means to counter his signature move, Chirakasonne ingests Dokkirium and defeats both Engine-Oh and Seiku-Oh easily. But GunBir-Oh turns the tables and overloads Chirakasonne with its attack.

Chirakasonne is voiced by Bin Shimada (島田 敏, Shimada Bin), previously the voice of Satarakura in Ninpuu Sentai Hurricanger.

Pollution President Batcheed (害統領バッチード, Gaitōryō Batchīdo, [Note 19]) is the top leader of the Gaiark who appears in Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!! and ends his sentences with "de aru". He has been conquering the Gunman World (ガンマンワールド, Ganman Wārudo) when he comes across the Go-ongers and battles them before intending to enter the Human World. When they are all sent through a dimensional rift to the Human World, Batcheed joins forces with the Gedoushu so he can use their Sanzu River's water to complete the Batchrium Plant (バッチリウムプラント, Batchiriumu Purant) on the moon's surface which can pollute all the Braneworlds. His attacks are Batcheed Spiral (バッチードスパイラル, Batchīdo Supairaru) which shoots gears from his head, and Batcheed Vulcan (バッチードバルカン, Batchīdo Barukan) which fires screw-shaped bullets from his abdomen. After executing Industrial Revolution and combining with the Batchrium Plant, he is destroyed by the Samurai Giants and the Engines in the Samurai Formation 23.[34]

Batcheed is voiced by Banjō Ginga (銀河 万丈, Ginga Banjō).

Cousin groups related to the Gaiark who are as evil as they are.

Preceding the Gaiark as the Engines' mortal enemies, the Barbaric Machine Clan Arelunbra Family (蛮機族アレルンブラ家, Bankizoku Arerunbura Ke) were sea-based androids terrorized Machine World with their Water Pollution Machine Knights (害水機士, Gaisui Kishi) before their leader Nigorl left for the Human World and the Arelunbra faded into legend.

• Water Pollution Machine Knight Uzumaquixote (害水機士ウズマキホーテ, Gaisui Kishi Uzumakihōte, 25): A servant of Nigorl who ends his sentences with "Knight", armed with a jousting lance and shield with the ability to consume anything from garbage to energy. Stuck on Earth as a stone statue after too more exposure to the clean surroundings, Uzumaquixote was found by a young Renn, thinking that it was a Kṣitigarbha (地蔵, Jizō) statue as he prayed to it to make his mother better before she died. By present day, Renn sought out the statue when he visited his childhood home, with the Pollution Ministers and Go-on Wings fighting over it. In the end, Kegalesia revives Uzumaquixote and has him attack the Go-ongers, until Renn transforms into Go-on Blue seeing his "family" more important than his sentimentality for the statue. After ingesting Bikkurium, Uzamaquixote is scrapped after a three-pronged attack from Seiku-Oh, GunBir-Oh, and Engine-Oh after Renn perfects the Kyu-yu Soul's re-energizing powers, but not before revealing his master being on Earth as well. Uzamaquixote is named after the Japanese word for "spiral" and "whirlpool" (渦巻, uzumaki) and Don Quixote (ドン・キホーテ, Don Kihōte). Voiced by Naomi Kusumi (楠見 尚己, Kusumi Naomi).
• Water Pollution Prince Nigorl zo Arelunbra (害水王子ニゴール・ゾ・アレルンブラ, Gaisui Ōji Nigōru zo Arerunbura, 26): Prince of the Arelunbra, a fencing master of the Nigorl Rapier (ニゴールレイピア, Nigōru Reipia) and able to summon rain clouds. Nigorl ended up on Earth in suspended animation after Kegalesia turns him down, due to the fact that he has an unusual liking to things he considers beautiful which contradicts the Gaiark's taboo on the word "beauty." Though revived, Nigorl's affections turn from Kegalesia to Bearrv as he attempts to marry her. But after the team regains Bearrv from him, Nigorl is mortally wounded and left to die by Kegalesia. While fighting, Nigorl's stronger ability is the Water Pollution branch's trademark Water Pollution Fusion, using it on Kegalesia and mass amounts of water to enlarge into a giant without need of Bikkurium and having Kegalesia interfaced in his systems as a battery to increase his power. In this state, referred as Mix Kegalegorl (ミックス・ケガレゴール, Mikkusu Kegaregōru), Nigorl's attacks are Kegalegorl BeBeBeBeam (ケガレゴール・ビビビビーム, Kegaregōru BiBiBiBīmu) and Kegalegorl ThunThuThunder (ケガレゴール・サンササンダー, Kegaregōru SanSaSandā). His name is from the Japanese word for "to get impure" (濁る, nigoru). Voiced by Kenji Nojima (野島 健児, Nojima Kenji).

The Barbaric Machine Clan Horonderthal (蛮機族ホロンデルタール, Bankizoku Horonderutāru, 34 & 35) is of a legendary clan of giant Clockwork Savage Machines which caused the extinction of the dinosaurs on the earth 65 million years ago with his violence-inducing Horonden Wave (ホロンデン波, Horondenpa). He battled with the Ancient Engines at that time, with their fight ending up with both sides fossilized within a mountain. Making it his goal, Yogostein manages to find the location with the aid of Drill Banki, only to accidentally free the Ancient Engines instead. But after personally finding the exact location of Horonderthal, Yogostein awakens him from his rest and upgrades him so that his attack can affect Kyoretsu-Oh. However, in spite of his modern-time upgrades, the Horonderthal became the first to be scrapped by Engine-Oh G12 with Yogostein taking the Horonderthal's power for himself. His name is from the Japanese word for "extinct" (滅ぶ, horobu) and "Neanderthal" (ネアンデルタール, Neanderutāru).

Barbaric Machine Soldiers Ugatz (蛮機兵ウガッツ, Bankihei Ugattsu)

Android footsoldiers built to support the Barbaric Machine Beasts and pilot the Barbaric Dohmas, later upgraded by Hiramechimedes with his screws. When Nigorl arrives, he brings his own feminine Beauty Ugatz (ビューティウガッツ, Byūti Ugattsu), which are stronger than the regular Ugatz. Some of the Ugatz had their souls removed from them by Yogostein to revive the Savage Machine Beasts. In Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!, the Ugatz can transform into motorcycles for the Nanashi to ride. They return in Kaizoku Sentai Gokaiger first fighting the Gokaiger along with the other foot soldiers in the Ghost Ship film and later under the service of Babatcheed. Its name is from the Japanese word for "dig" (穿つ, ugatsu).

Barbaric Dohma (蛮ドーマ, Bandōma)

Cave cricket-like jet fighters invented by Hiramechimedes which can assume a frog-like walking mode. Though normally used by the Ugatz, the Pollution Ministers piloted their own Barbaric Dohmas before escaping to Earth. Its name is from the Japanese word for "cave cricket" (カマドウマ（竈馬）, Kamadōma).

Barbaric Dohma SP (Special) (蛮ドーマＳＰ, Bandōma Supesharu)

Cave cricket and Mantis-like jet fighters that serve as Hiramechimedes' personal transport, each able to hold up to four Barbaric Dohma on itself to resemble a classic World War I airplane. The Pollution Ministers later used their own Barbaric Dohma SP to transport their Recycle Savage Machine Beast Army to carry out their plan to tear down the dimensional barrier.

The Barbaric Machine Beasts (蛮機獣, Bankijū) are monsters created to pollute the Earth. They are each separated into one of three types that are under the Pollution Ministers: Savage Ground (害地, Gaichi), Savage Sea (害水, Gaisui), and Savage Sky (害気, Gaiki). The Barbaric Machine Beasts are infused with a special energy called Bikkurium (ビックリウム, Bikkuriumu) that enlarges them in a process called Industrial Revolution (産業革命, Sangyō Kakumei), however this process can be activated while the Barbaric Machine Beast is still alive. They are named putting the suffix "Banki" (バンキ, Banki) after the name of the object they are based on, machines that were present at the turn of the century. When scrapped, the dead Savage Machine Beasts shrink back to normal size and end up at the Savage Machine Beast Graveyard. Yogostein took advantage of this in his Savage Machine Beast program by using Ugatz souls to reanimate the Recycled Barbaric Machine Beast Army (リサイクル蛮機獣軍団, Risaikuru Bankijū Gundan, movie), only for them to be rescrapped by the Engines due to being much weaker than they used to be.

• Shoukyaku Banki (ショウキャクバンキ, Shōkyaku Banki, 1): An incinerator (焼却炉, shōkyakuro) Savage Sky Barbaric Machine Beast sent by Kitaneidas, putting stuff into the furnace on his forehead to induce smog and perform his attacks. Shoukyaku Banki prefers to burn flowers and anything pretty to improve the toxicity of his smog. He fails in his mission when the Go-ongers arrive, and is forcefully upgraded by the Pollution Ministers. Shoukyaku Banki is the first to be scrapped by Engine-Oh. The second Shoukyaku Banki in the narikiri movie Legendary Hero (伝説ノヒーロー, Densetsu no Hīrō) was scrapped by Engine-Oh. Voiced by Takashi Nagasako (長嶝 高士, Nagasako Takashi).
• Pipe Banki (パイプバンキ, Paipu Banki, 2): A drainage pipe (排水パイプ, haisui paipu) Savage Water Barbaric Machine Beast sent by Kegalesia to pollute Earth's waters with the sludge from his pipes, tending to say "Jobber" in his sentences. The Go-ongers for fight him when he tests his powers at a dam, retreating after succeeding. He then returns later to pollute Shindaiba in giant form, attacking the Go-ongers once learning they are without their Engine Casts. But once the three get them back, Pipe Banki is then scrapped by Engine-Oh after a messy hostage situation. Voiced by Takayuki Kondō (近藤 孝行, Kondō Takayuki).
• Scoop Banki (スコップバンキ, Sukoppu Banki, 3): A scoop (スコップ, sukoppu) Savage Land Barbaric Machine Beast sent by Yogostein to attack Neo Tokyo Hills, tending to say "Kappore" (a meaningless word sung for rhythm) in his sentences. His trademark attacks are "Landslide Blizzard" and the stronger "Super Landslide Blizzard", using his shovel gauntlets to scoop up boulders or bury his opponents in dirt. He is scrapped by Engine-Oh after being corrected by Go-on Blue that Musashi killed Kojirō not with two swords, but with a long bokken (the length of the Go-on Sword gave the Go-ongers a greater advantage over Scoop Banki's shovel gauntlets). Voiced by Tamotsu Nishiwaki (西脇 保, Nishiwaki Tamotsu), previously the voice of Highness Duke Org Ura in Hyakujuu Sentai Gaoranger.
• Spray Banki (スプレーバンキ, Supurē Banki, 4): A clumsy yet over eager spray bottle (スプレー, supurē) Savage Water Barbaric Machine Beast sent by Kegalesia as her assassin to steal the Engine Cast of Birca. He can shoot acid from his mouth. He is wounded by Birca and Gunpherd before Engine-Oh scraps him. Voiced by Antoki no Inoki (アントキの猪木).
• Jishaku Banki (ジシャクバンキ, Jishaku Banki, 5): A magnet (磁石, jishaku) Savage Land Barbaric Machine Beast sent by Yogostein with the power of magnetism, able to take his opponents' weapons and use them. Though defeated in the first fight, Jishaku Banki is upgraded to Denjishaku Banki (デンジシャクバンキ, Denjishaku Banki), becoming an electromagnet (電磁石, denjishaku) with greater power with his Fleming's Law attack until Hant destroys his power source. He is the first to be scrapped by Engine-Oh Birca. Voiced by Toshiharu Sakurai (桜井 敏治, Sakurai Toshiharu).
• Speaker Banki (スピーカーバンキ, Supīkā Banki, 6): A speaker (スピーカー, supīkā) Savage Sky Barbaric Machine Beast sent by Kitaneidas, able to convert beautiful sound waves into noise pollution with his microphone spear before shooting out the resulting sound waves from his speakers. Speaker Banki is later upgraded to generate louder sound waves that can block most attacks. However, Speaker Banki's one weakness was the (nonfunctional) speakers on his feet. He is the first to be scrapped by Engine-Oh Gunpherd, as it could break through the barrier. Voiced by Issei Futamata (二又 一成, Futamata Issei).
• Bombe Banki (ボンベバンキ, Bonbe Banki, 7): A gas cylinder (ボンベ, bonbe, from the German bombe) Savage Water Barbaric Machine Beast sent by Kegalesia in her plan to get rid of Engine-Oh, though Carrigator almost ruined it. To that end, he intentionally had himself defeated to enlarge and use his Red Rust Beam to defeat Engine-Oh. However, Bombe Banki ends up being the first to be scrapped by GunBir-Oh. Voiced by Masato Hirano (平野 正人, Hirano Masato).
• Boring Banki (ボーリングバンキ, Bōringu Banki, 8): A boring machine (ボーリングマシン, bōringu mashin) Savage Land Barbaric Machine Beast sent by Yogostein to attack the city. Though he went to sleep suddenly, Boring Banki's sleep mode is a drilling mode to extract magma to destroy the city. In the end, Boring Banki is destroyed by both Engine-Oh and GunBir-Oh. Voiced by Naoki Imamura (今村 直樹, Imamura Naoki).
• Lens Banki (レンズバンキ, Renzu Banki, 9): A lens (レンズ, renzu) Savage Sky Barbaric Machine Beast sent by Kitaneidas to use his power to teleport people into Junk World, using the Braneworld's ability to mechanize humans as part of his plan to create new Ugatz. Though scrapped by Engine-Oh and GunBir-Oh, Lens Banki's pictures of their final attacks are used in the creation of Kagami Banki. Voiced by Kōichi Tōchika (遠近 孝一, Tōchika Kōichi).
• Kagami Banki (カガミバンキ, Kagami Banki, 10): A mirror (鏡, kagami) Barbaric Machine Beast created in by all three of the Pollution Ministers, tending to say "Mirror" in his sentences. Because of the pictures Lens Banki took before being destroyed, Kagami Banki can use the mirror on his chest to duplicate the Engines' attacks with his "Mirror Effect". After being recharged with Bikkurium, which took longer in his case, Kagami Banki reveals his true Land/Sky/Sea Form, possessing the powers of all three Pollution Ministers, using it in his "Mirror Bomb" attack. He is the first to be scrapped by Engine-Oh G6. Voiced by Junpei Morita (森田 順平, Morita Junpei), previously the voice of Creator King Ryuuwon in GoGo Sentai Boukenger.
• Antenna Banki (アンテナバンキ, Antena Banki, 11): An antenna (アンテナ, antenna) Savage Sky Barbaric Machine Beast sent by Kitaneidas, it can interfere with television signals by sending his own special hypnotic ones to control anyone who saw a television getting that signal, brainwashing the masses into polluting the city while forcing the Go-ongers apart with what their desire the most save Gunpei. His signature attack is "Satellite Shower", firing a beam in the air with multitude of lasers raining down on his opponent. He is scrapped by GunBir-Oh's Gunpherd Gunfire. Voiced by Hideaki Kusaka (日下 秀昭, Kusaka Hideaki).
• Hatsuden Banki (ハツデンバンキ, Hatsuden Banki, 12): An electrical generator (発電機, hatsudenki) Savage Land Barbaric Machine Beast sent by Yogostein that can drop powerful lightning bolts, saying "bika" in his sentences. Sōsuke tried to use this against Hatsuden Banki but it resulted in both switching bodies when Hatsuden's lightning hit them. Though tried to take advantage of his current state, Hatsuden loses it after listening to the others' babbling and runs off to find Yogostein. When Yogostein retreated as his minion is exposed, Hatsuden Sōsuke attempts to destroy the Go-ongers as Go-on Red. By then, Go-Ongers managed to revert this by shooting a special Sōsuke Soul into Hatsuden Go-on Red with the Junction Rifle, returning the Barbaric Machine Beast back into his body. But now hampered by a cold that Sōsuke had been suffering, Hatsuden Banki is scrapped by Engine-Oh G6. Voiced by Nobuyuki Hiyama (檜山 修之, Hiyama Nobuyuki).
• Hikigane Banki (ヒキガネバンキ, Hikigane Banki, 13): A trigger (引き金, hikigane) Savage Water Barbaric Machine Beast under Kegalesia, ranked as Gaiark's top sniper and says "Gane" in his sentences. He was sent to take Būkorin back to Gego, whom he called "Boss" (兄貴, Aniki) for stopping his attack without trouble. Using his various attacks, like "Water Magnum", Hikigane Banki overpowers the Go-ongers until Renn arrives to even the odds. He is scrapped by Engine-Oh G6 and he regrets that he will not see the Chunichi Dragons' win one last time. Voiced by Yasuaki Takumi (内匠 靖明, Takumi Yasuaki).
• Kama Banki (カマバンキ, Kama Banki): A bath heater (14, 風呂釜, furogama) Savage Water Barbaric Machine Beast sent by Kegalesia, says "Come On" in his sentences. By using the mist from his nostrils, Kama Banki can teleport people into the hot springs on his head and remove any interference in Gaiark's plan. It is only after reaching enlightenment that the Savage Machine Beast's power reaches its zenith, though Kama Banki is no match for a love-filled Hant before a "mixed-up" Engine-Oh G6 scraps him. Voiced by Tamio Ōki (大木 民夫, Ōki Tamio).
• Oil Banki (オイルバンキ, Oiru Banki, 16): An oil (オイル, oiru) Savage Water Barbaric Machine Beast sent by Kegalesia who can create a super slippery oil slick on the city, incapacitating not only normal ground vehicles but Engine-Oh G6. After being defeated by Toripter and Jetras, Hiramechimedes upgrades Oil Banki with wings to take on the Wing Engines. But using mops to counter the oil slick, Engine-Oh and GunBir-Oh scrap Oil Banki with little trouble. Voiced by Taketora (武虎).
• Happa Banki (ハッパバンキ, Happa Banki, 17): A dynamite (ダイナマイト, dainamaito) Savage Earth Barbaric Machine Beast, Yogostein's "number one hooligan" and ends his sentences with "dappa." He is sent to destroy the city with his Dynamite Don-Don attack until the Go-on Wings interfere. Teaming up with Yogostein and Hiramechimedes as part of a trio, Happa Banki overwhelms the Go-ongers until the Go-on Wings arrive. He is scrapped by Go-on Gold after he takes his Bikkurium, preventing him from growing, and instead making him explode. His name comes from the Japanese word for "rock blasting" (発破, happa). Voiced by Masaharu Satō (佐藤 正治, Satō Masaharu).
• Vacuum Banki (バキュームバンキ, Bakyūmu Banki, 18): A vacuum cleaner (掃除機, sōjiki) Savage Sky Barbaric Machine Beast sent by Kitaneidas to terminate the Go-on Wings while their guard is down. But after being man handled by Go-on Gold Vacuum Banki kidnaps Miu and holds her hostage to force Hiroto give up his Wing Trigger and Change Soul. Sōsuke's inference allows Miu to be freed as all three manage to defeat Vacuum Banki. He is the first Barbaric Machine Beast to be scrapped by Engine-Oh Jetripter. Voiced by Taiki Matsuno (松野 太紀, Matsuno Taiki), previously the voice of Shurikenger in Ninpuu Sentai Hurricaneger.
• Nokogiri Banki (ノコギリバンキ, Nokogiri Banki, 19): A saw (ノコギリ, nokogiri) Savage Earth Barbaric Machine Beast who ends his sentences with "Giri." With his saw blade arm, Nokogiri Banki can cut through any material, though he only targeted things taller than himself. His only weakness was a constant tightening of the bolt that keeps his forearm together. Though scrapped by Engine-Oh G6, Hiramechimedes rebuilds him into the stronger Chainsaw Banki (チェーンソーバンキ, Chēnsō Banki, 20). Now chainsaw (チェーンソー, chēnsō)-based with his weaknesses removed, Chainsaw Banki was properly used by Hiramechimedes in a plan to take out both Go-on teams while polluting the air, only for Jum-bowhale's interference to ruin it as Chainsaw Banki is scrapped by Seiku-Oh. Voiced by Takayuki Godai (五代 高之, Godai Takayuki), who previously portrayed Takayuki Hiba/Vul Eagle II in Taiyo Sentai Sun Vulcan.
• Fūsen Banki (フーセンバンキ, Fūsen Banki, 21): Referred as the "Tiger of Balloons", this balloon (風船, fūsen) Savage Sky Barbaric Machine Beast rubbery body made him immune to most physical attacks as well as use his balloons in his "Jet Balloons" and "Balloon Bombs" attacks. Fūsen Banki was sent by Kitaneidas to give off his smog-filled balloons to children, until the Go-on Wings drove him off. However, Hiramechimedes has Fūsen Banki use his inflation power on Bomper and target him so the Go-ongers would get hurt protecting him. However, Seiku-Oh's interference ruins the plan as it scraps the Savage Machine Beast. Voiced by Ippei Hara (原 一平, Hara Ippei).
• Bōseki Banki (ボーセキバンキ, Bōseki Banki, 22): A spinning mule (紡績機械, bōseki kikai) Savage Earth Barbaric Machine Beast sent by Yogostein to aid Hiramechimedes in his plan by making a pretend assassination attempt on his life, able to fire streams of yarn string to immobilize her enemy in her Shuuraiya attack. However, once Hiramechimedes springs his trap, she undergoes "Original Industrial Revolution" (元祖産業革命, Ganso Sangyō Kakumei) to lay the deathblow on Seiku-Oh before being the first Savage Machine Beast to be scrapped by Engine-Oh G9. Voiced by Rica Matsumoto (松本 梨香, Matsumoto Rika).
• Dowsing Banki (ダウジングバンキ, Daujingu Banki, 27): A dowsing rod (ダウジングロッド, daujingu roddo) Savage Sky Barbaric Machine Beast who uses a pair of tonfa as her weapons and as dowsing rods, ending her sentences with -ing (-イング, -ingu) words (e.g., "running," "fencing," "ending"). She manages to overpower Engine-Oh Gunpherd until she weakened by being covered in flowers, with Engine-Oh G9 finishing her off. Voiced by Harumi Edo (エド・はるみ, Edo Harumi).
• Manhole Banki (マンホールバンキ, Manhōru Banki, 28): A manhole (マンホール, manhōru) Savage Water Barbaric Machine Beast who moves too fast for even Bomper and the Go-on Wings to sense, using "Glug" in his sentences. He is sent kidnap pen-spinners as part of Kitaneidas' plan to power his Destructive Sound Machine and destroy the city. His signature move is "Grind Manhole", shooting out manholes at his enemies. He was eventually scrapped by Engine-Oh G9. Voiced by Kentarō Itō (伊藤 健太郎, Itō Kentarō).
• Hammer Banki (ハンマーバンキ, Hanmā Banki, 29): A hammer (ハンマー, hanmā) Savage Land Barbaric Machine Beast created by Yogostein when he returned from his travel. Being infused with his creator's hate, Hammer Banki is compelled to destroy everything even to the point of disobeying Yogostein. Hammer Banki was the first to battle the completed Go-Roader. Voiced by Riki Kitazawa (北沢 力, Kitazaki Riki).
• Straw Banki (ストローバンキ, Sutorō Banki, 30): A drinking straw (ストロー, sutorō) Savage Water Barbaric Machine Beast who ends his sentences with "buku". Other than using his Straw Scatter Shot to make people breathe out poison gases, his power depends on any of four bottles he drinks to gain a special ability. His Explosive Drink, in a yellow bottle, allows him to shoot soap bubbles that explode on impact, his Smokescreen Drink, in a purple bottle, releases a smoke screen, and his Capsule Drink, blue bottle, creates a bubble prison. However, with the red Gai Aqua, a special power-up drink created by Kegalesia, Straw Banki's abilities and evil increase. Though he loses the Gai Aqua in his initial attack, Kegalesia creates a supply of it for her monster to use when he overwhelms the team without Go-on Red. But once the Go-on Mach Team arrives, Straw Banki is defeated by the duo before Industrial Revolutionizing and scrapped by Bearrv, Bus-on, Seiku-Oh, and GunBir-Oh. Voiced by Yasuhiro Takato (高戸 靖広, Takato Yasuhiro), previously the voice of Raigel/Meemy in Mahou Sentai Magiranger.
• Drill Banki (ドリルバンキ, Doriru Banki, 32 & 33): A drill (ドリル, doriru) the Most Powerful Savage Land Barbaric Machine Beast who ends his sentences with -dori (ドリ, -dori) words and can fire his Dri-Cam Attack from the drill horn on his attack. Sent by Yogostein to find the "Golden Dragon" in hope it was the Horonderthal, Drill Banki accidentally revived the Ancient Engines instead and had been berated by Yogostein to find them under the impression that they are the Horonderthal. Taking out his frustrations on the Go-ongers, Drill Banki is the first to be scrapped by Kyoretsu-Oh. Voiced by Chihiro Suzuki (鈴木 千尋, Suzuki Chihiro), previously the voice of the Quester Rei in GoGo Sentai Boukenger.
• Heater Banki (ヒーターバンキ, Hītā Banki, 34): A heater (ヒーター（電熱器）, hītā (dennetsuki)) Savage Sky Barbaric Machine Beast sent by Kitaneidas to put the city in a heat wave before change of plans to target the city's gas tanks. Using the Burning Coil (灼熱コイル, Shakunetsu Koiru) batons as his weapons, Heater Banki's signature attack is Fiery-Wind Beam. He was frozen and scrapped by Kyoretsu-Oh. Voiced by Atsushi Imaruoka (伊丸岡 篤, Imaruoka Atsushi).
• Engine Banki (エンジンバンキ, Enjin Banki, 37): An Engine (炎神, Enjin) Savage Sky Barbaric Machine Beast created by Kitaneidas based on Engine-Oh to avenge the death of Yogostein. Assuming the form of gas guzzling dekotora with the mentality of a trucker, ending his sentences with "Tora", Engine Banki can Tru-Transform into a humanoid form to execute his Big Tornado, Roaring Cannon, and Assault First Star Missile attacks. He was shrunk by the Kankanber and scrapped by the Kankan Mantangun. Voiced by Tetsu Inada (稲田 徹, Inada Tetsu), previously the voice of Highness Duke Org Shuten in Hyakujuu Sentai Gaoranger and Doggy Kruger/DekaMaster in Tokusou Sentai Dekaranger.
• Shower Banki (シャワーバンキ, Shawā Banki, 38): A shower (シャワー, shawā) Savage Water Barbaric Machine Beast who ends her sentences with "Shower". Shower Banki is by Kegalesia with a special liquid to cover the city in acid rain. However, the liquid's formulation was not acidic and had an unforeseen side effect that freezes any male exposed to it within 30 minutes. Once aware of this, Kegalesia gives Shower Banki Super Ultra Gorgeous Acid Rain and sends her to eliminate the male Go-ongers. However, Saki, Miu, and Bearrv managed to outwit and beat her. But by the time Shower Banki Industrial Revolutionizes, the male Go-ongers arrive in their Engines with GunBir-Oh Jetras and Seiku-Oh Gunpherd scrapping her. Voiced by Hiromi Tsuru (鶴 ひろみ, Tsuru Hiromi).
• Yatai Banki (ヤタイバンキ, Yatai Banki, 39): A yatai (屋台, yatai) Savage Sky Barbaric Machine Beast who ends his sentences with "-wasshoi" (ワッショイ, wasshoi). He is sent to capture children in order to start up Kitaneidas' plan to subjugate the world into chaos with endless festive fun. However, when it turned out the Minister's plan was too time-consuming, Yatai Banki is sent to fight the Go-ongers while Ministers go after the two boys from the Samurai World have entered the Human World. But after using his festival space on them, he is scrapped by the three Engine formations. Voiced by Kōichi Sakaguchi (坂口 候一, Sakaguchi Kōichi), previously the voice of Duke Org Yabaiba in Hyakujuu Sentai Gaoranger.
• Bin Banki (ビンバンキ, Bin Banki, 42): A bottle (ビン, bin) Savage Water Barbaric Machine Beast who ends his sentences with bin. Though a weakling with his signature attack, Hot Water Commercial, even weaker, Kegalesia has Manabu Yushima use his magic to upgrade the Savage Machine Beast into the stronger Thermos (魔法瓶, mahōbin)-based Mahōbin Banki (マホービンバンキ, Mahōbin Banki), now able to use magic and adding "Tiger" in his sentences. But once stripped of his magic and Industrial Revolutionized, Mahōbin Banki is scrapped by Kyoretsu-Oh while making references to Leonardo da Vinci. Voiced by Wataru Takagi (高木 渉, Takagi Wataru).
• Dumbbell Banki (ダンベルバンキ, Danberu Banki, 46): A dumbbell (ダンベル, danberu) Savage Sky Barbaric Machine Beast built to be the strongest, ending his sentences with "bell" (ベル, beru). He is sent to use his heavy breathing from his workout to fill the air with carbon dioxide. Though strong, Dumbbell Banki's forearms are so heavy that he cannot lift them up himself, and relies on two Ugatz named Ugatz L and Ugatz R to lift his arms for him via remote control. But without them, Dumbbell Banki can fire the Super Dumbbell Missile from his chest as both a defense and an offense. He is scrapped by the teamwork of Seiku-Oh and the Go-Roader. Voiced by Yūji Kishi (岸 祐二, Kishi Yūji), who previously portrayed Kyousuke Jinnai/Red Racer in Gekisou Sentai Carranger.
• Kettei Banki (ケッテイバンキ, Kettei Banki, 48): A Barbaric Machine Beast sent by Kegalesia and Kitaneidas who was modeled after all of the Barbaric Machine Beasts (全ての蛮機獣, Subete no Bankijū) that came before, thus able to use all their attacks. The name comes from the Japanese word for "definitive" (決定, kettei). He is scrapped by the combined finishing attacks of Engine-Oh, Kyoretsu-Oh, and Seiku-Oh. Voiced by Daisuke Gōri (郷里 大輔, Gōri Daisuke), previously the voice of Chuuzubo in Ninpuu Sentai Hurricanger.

• Mic Banki (マイクバンキ, Maiku Banki): A microphone (マイクロフォン, maikurofon) Savage Sky Barbaric Machine Beast sent by Kitaneidas who appeared in the special drama sessions of the first Engine Sentai Go-onger original soundtrack. He is scrapped by Engine-Oh.
• Hedoro Banki (ヘドロバンキ, Hedoro Banki): A sludge (ヘドロ, hedoro) Savage Water Barbaric Machine Beast sent by Kegalesia who appeared in the special drama sessions of the first Engine Sentai Go-onger original soundtrack. He is scrapped by Engine-Oh and GunBir-Oh.
• Kussaku Banki (クッサクバンキ, Kussaku Banki): An excavator drill (掘削機, kussakuki) Savage Land Barbaric Machine Beast sent by Yogostein who appeared in the Go-onger Manga. He is scrapped by Engine-Oh G6.
• Okunote Banki (オクノテバンキ, Okunote Banki): Appeared in the stage show Aerial Warriors! The Go-on Wings Appear!! (天空の戦士！ゴーオンウイングス登場！！, Tenkū no Senshi! Gōon Uingusu Tōjō!!). The name comes from the Japanese word for "trump" (奥の手, oku no te).
• Nunchaku Banki (ヌンチャクバンキ, Nunchaku Banki, Go-onger vs. Gekiranger): A nunchaku (ヌンチャク, nunchaku) Special Land/Sea/Air Pollution Type Savage Sky Barbaric Machine Beast created by Meka in the Engine Sentai Go-onger vs. Gekiranger movie. Because his creator is of the Rinjūken Akugata, Nunchaku Banki can perform Ringi. After being installed with the Dōkokugan Soul, Nunchaku Banki becomes super powerful until he is forced to shut down by Go-on Red and GekiRed. However, his lifeless body is later used by Long in the form of Long Banki before its destruction by Engine-Oh G12 and SaiDaiGekiRinTohja's combined final attack, The Engine Beast Grand Prix. Voiced by Takahiro Yoshimizu (吉水 孝宏, Yoshimizu Takahiro).
  • Nunchaku Banki's Ringi: Air Splitting Wave (空裂波, Kureppa) is a dimensional Ringi, and Delayed Weakening (時劣態, Jirettai) is a Ringi that has a delayed effect on the opponent that injures him.

Occasionally, the Go-ongers will meet people and creatures from the other 9 Braneworlds that existence entails.

Lumbiaco (ロムビアコ, Romubiako, 31)

Lumbiaco is a monster from the Sound World (サウンドワールド, Saundo Wārudo), which was destroyed by Kireizky, who comes to the Human World with the intent to feed on its noises. By doing so, it grows in size and takes a nap before it feeds again, with the cycle repeating until it's too big for the world to hold. The only means to shrink it is with beautiful sound, which Lumbaico hates and goes on a rampage upon hearing. In the end, the monster is stopped by the specially assembled G3 Princess group who shrink him and destroy him with their attack. Its name is an anagram of "Columbia" (コロムビア, Koromubia), the record company that distributes the music for the Super Sentai Series.

Wameikle (ワメイクル, Wameikuru, 41)

Wameikle is a member of a species of amphibian from the Stormy World (ストーミーワールド, Sutōmī Wārudo), a Braneworld that is in a constant cycle of endless wind storms. Ending up in the Human World due to the Gaiark's influence, a Wameikle egg is found by Hiroto, with the hatched creature seeing him as a parent. However, the Ugats are sent after Wameikle to force grow it into a berserker adult and utilize its kind's high-pitch sonic crying to tear down the dimensional barrier that separates the Human World from the Stormy World. Its name is from the Japanese word for "to cry" (喚く, wameku). Voiced by Chika Sakamoto (坂本 千夏, Sakamoto Chika).

Mage's Wand (魔法の杖, Mahō no Tsue, 42)

The Mage's Wand (and spellbook) comes from the Magic World (マジックワールド, Majikku Wārudo), a Braneworld that is home to many sorcerers and magic is everyday until Kireizky wiped it out. The spellbook was deciphered by Manabu Yushima (湯島 学, Yushima Manabu), an intelligent high school student who found these by chance. Yushima fell in love with Miu and attempt to win her by helping Kegaleshia magically infuse Bin Banki with magical powers. Though he eventually redeemed himself, Yushima accidentally destroyed his laptop and the translations in it.

Santa Claus (サンタクロース, Santa Kurōsu, 43 & 44)

Santa Claus is a being from the Christmas World (クリスマスワールド, Kurisumasu Wārudo), a Braneworld where the holiday season is endless with everyone dressed as Santa Claus and able to travel to other Braneworlds by train. Using the Different Dimension Present Bag (異次元プレゼント袋, Ijigen Purezento Bukuro) he carries with him, Santa can take out presents from Christmas World and bring them into other Braneworlds. Portrayed by Kinzo Sakura (桜 金造, Sakura Kinzō).

Other Braneworlds mentioned in the series are the destroyed Prism World (プリズムワールド, Purizumu Wārudo) and serene Grass World (グラスワールド, Gurasu Wārudo) as well as the western-style Gunman World (ガンマンワールド, Ganman Wārudo) which is currently being attacked by Batcheed and the remaining Gaiark forces as the series ends. The only other Braneworld that is extensively covered is the Samurai World.

The Junk World (ジャンクワールド, Janku Wārudo) is a Braneworld that resembles a junkyard due to Osen's invention that can multiply garbage and alters any organic being to possess the same attributes as scrap metal. Three years before the events of 10 Years Grand Prix, the Eleki Clan Zontark (エレ機族ゾンターク, Erekizoku Zontāku), a new clan consisting of two machine-men, was born from a pile of electronic waste and conquered the Junk World. Zontark comes from the Japanese word for "surmise" (忖度, sontaku).

Osen (オーセン, Ōsen, 27)

Osen is a tech-sorceress from the Junk World (ジャンクワールド, Janku Wārudo). She assumes a human form named Osen (お仙) when she is deceived by Kitaneidas into thinking that her own Braneworld was in danger by an invasion from the Human World and decides to use her machine to give Gaiark the advantage. But after meeting Hant and seeing his kindness, Osen reverses her machine's polarity to turn the tables for the Go-ongers before returning to her own dimension. Her name is from the Japanese word for "pollution" (汚染, osen). Portrayed by Hana Kino (木野 花, Kino Hana).

Noizun (ノイーズン, Noīzun, 10 Years Grand Prix)

Noizun is the leader of the Zontark who assumes a human form named Shinichiro Noizumi (野泉 進一郎, Noizumi Shin'ichirō), the Minister of Defense. He uses a spear as his weapon. With other clan members, he can perform the Zontark Revolution (ゾンタークレボリューション, Zontāku Reboryūshon) attack. He gave the N Chips (Nチップ, Enu Chippu) to people to turn them into the Noizumi Children (野泉チルドレン, Noizumi Chirudoren), his servants resembling the Gaiark's Hiramechimedes, and also covered the Human World with the Country-Closing Barrier (鎖国バリア, Sakoku Baria). He later turns Saki into the first Noizumi Child, but after Sōsuke rescues Saki from inside it, it is scrapped by the Go-on Wings in the final battle. In the final battle, he is scrapped by Engine-Oh G7. Voiced by Satoshi Jinbo (神保 悟志, Satoshi Jinbo), who also portrays his human form.

Grayzky (グレイズキー, Gureizukī, 10 Years Grand Prix)

Grayzky is the deputy leader of the Zontark resembling the Gaiark's Kireizky who assumes a human form named Taku Kurei (暮井 拓, Kurei Taku), the leader of the special police force. He uses an assault rifle and a rocket launcher as his weapons. In the final battle, he is scrapped by Go-on Green and Black. Voiced by Yuu Kamio (神尾 佑, Kamio Yū), who also portrays his human form.

Samurai World (サムライワールド, Samurai Wārudo) is a Braneworld that resembles Feudal Japan and was under the dictatorship of Empress Maki and her Yōma until the Go-ongers ended up in the Braneworld by accident and help in overthrowing Maki. It later would turn out that few Samurai World residents have an identical counterpart in the Human World they are linked to via the soul as shown with Retsu-Taka's Human World counterpart.

Bakki (伐鬼（ばっき）, 24)

Bakki is a deforestation Yōma recruited by the spectral Urameshimedes. He comes to the Human World to kill the Go-ongers for Urameshimedes with Earth's forests as his price. But once defeated by Go-on Yellow, Urameshimedes possesses Bakki's body to personally finish the job only for Bakki to be destroyed by Engine-Oh G9.

Rairaiken (雷々剱, 39 & 40)

Rairaiken is the crimson-colored lion-like Yōma servant of Maki. He is similar to Raiken from the movie, but he is not created from an Engine Cast and he lacks a vehicle form. He can wield a kusarigama/kusarifundo. After Maki's death, he later arrives in the Human World to take the Engine Sword and use Engine Dai-Shogun for evil. However, the Go-ongers ruin his and Gokugokumaru's plan, so the two ingest Bikkurium to execute their Fukoku Kyohei (富国強兵, Fukoku Kyōhei) enlargement before being destroyed by Engine Dai-Shogun. Voiced by Naoya Uchida (内田 直哉, Uchida Naoya), who previously portrayed Tatsuya Midorikawa/Denzi Green in Denshi Sentai Denziman.

Gokugokumaru (獄々丸, 39 & 40)

Gokugokumaru is a crimson-colored bear-like Yōma servant of Maki. He is similar to Gokumaru, but he was not created from an Engine Cast and he lacks a vehicle form. He fights with his claws and a large shuriken. After Maki's death, he later arrives in the Human World to take the small Engine Sword and use Engine Dai-Shogun for evil. However, the Go-ongers ruin his and Rairaiken's plan, so the two ingest Bikkurium before being destroyed by Engine Dai-Shogun. Voiced by Masaya Matsukaze (松風 雅也, Matsukaze Masaya), who previously portrayed Shun Namiki/MegaBlue in Denji Sentai Megaranger.

Harunosuke (晴之助, 39 & 40)

Harunosuke is a boy who comes from the Samurai World with his younger brother, Akinosuke, in order to protect the small Engine Sword (炎神剣, Enjinken) with a part of Retsu-Taka's soul. Portrayed by Shohei Yamauchi (山内 翔平, Yamauchi Shōhei).

Akinosuke (昭之助, 39 & 40)

Akinosuke is a boy who comes from the Samurai World with his older brother, Harunosuke, carrying the small Engine Sword on him. Portrayed by Hiroto Araki (荒木 博斗, Araki Hiroto).