Rise of the Teenage Mutant Ninja Turtles

• Raph (voiced by Omar Benson Miller[5]) – A 16 year old Alligator Snapping Turtle and leader of the group, Raph wields two tonfa in battle that can amplify his own strength with red energy.[6] In "Mascot Melee", it is revealed that Raph is allergic to peanuts and has a weakness for teddy bears. He has a habit of speaking in the third person in battle. Raph has numerous catchphrases: "Jumpin' Jackflash" when surprised and "Hot Soup" as a battle cry.

• Leo (voiced by Ben Schwartz[5]) – A 15 year old Red-Eared Slider who is known to be called the "trickster", and thinks that his one liners will "fire up the team"; but his actual encouraging charisma showed in "Origami Tsunami". Leo wields an ōdachi sword in battle that can open portals. He enjoys skateboarding and keeps plants in his room.[7] The episode "Minotaur Maze" reveals that Leo has an insecure side. In "The Gumbus", it is shown he feels a need to be right.

• Mikey (voiced by Brandon Mychal Smith[5]) – A 14 year old Ornate Box Turtle who is the "youngest jokester, prankster brother." He is an affectionate and sensitive artist, and is also called the "wild card". Mikey wields a kusari-fundo in battle that can become a fire spirit.[8] In "Donnie's Gifts" and "The Longest Fight", it is revealed that Mikey also has a passion for cooking especially for pizza. He is implied to have a fast metabolism, being miserable in his hunger as seen in "Minotaur Maze" and comparatively to the point of extreme anger as seen in "Pizza Pit".

• Donnie (voiced by Josh Brener[5]) – A 15 year old Spiny Softshell Turtle. He is the "genius of the team" and relishes praise from others. He has a sidekick drone named S.H.E.L.L.D.O.N. along with many battle shells that he makes in order to help him in battle because of his species. He rejects claiming a magical weapon like his brothers, and instead wields a high-tech version of his traditional bō staff in battle that can transform into a multitude of weapons like drills or a rocket powered hammer.[6] In "Mascot Melee", it was revealed Donnie has a crush on a comic book heroine called Atomic Lass. In "Stuck on You", Donnie reveals his computer password is "Bootyyyshaker9000" due to his love of dancing.

• April (voiced by Kat Graham[5]) – A human friend of the Ninja Turtles, she has already known them for 5 years prior to when the show started and is like their sister.[9] April is a fun-loving thrill seeking girl with glasses who is constantly looking for a job to support herself which constantly goes wrong. "Hypno: Part Deux!" shows that despite her bravado, she has a hard time making friends at school and is nervous about high school gatherings. When fighting, she also wields a baseball bat.[10] In "Warren & Hypno, Sitting in a Tree," it is revealed that April knows who Warren Stone is as she was part of a fan club dedicated to him called the Stoneheads, and she is 16 years old. In "Donnie vs. Witch Town," April's bat gets enchanted during her visit to the Hidden City's Witch Town district.

• Mayhem/Agent 64 – An unspecified cat/dog-like creature with short-range teleportation abilities that becomes April's pet.[11] It is an agent that worked for the Council of Heads against Baron Draxum and was sent to monitor him.

• Splinter (voiced by Eric Bauza[5]) – A mutant gray rat who is the Ninja Turtles' sensei and father. He is fond of watching the projects of Lou Jitsu, milk, and cake. His training of the Turtles manifests in copying and watching Lou Jitsu tapes, which is revealed to be more effective than the brothers expected. In "The Evil League of Mutants" and "Shadow of Evil", Splinter is revealed to be Hamato Yoshi as he neglected to carry out out the Hamato Clan's mission in preventing Shredder's return by working in Hollywood under the stage-name of "Lou Jitsu". He acquired a large fanbase during his career including Baron Draxum, who used his genetic sample to create the Turtles, and some members of the Foot Clan. His use of unconventional weaponry is inspired by Jackie Chan.[12] The flashback sequences of "Many Unhappy Returns" and "Goyles, Goyles, Goyles" reveal how Yoshi was abducted by Big Mama to fight in the Battle Nexus and his later mutation, from being constantly bitten by a rat, while Draxum used his DNA to create the Turtles.

• Todd Capybara (voiced by Thurop Van Orman) – A friendly mutant capybara and selfless charitable caretaker of Cuddles Cakes Puppy Rescue on Long Island. In exchange for Todd giving up his RV, Michelangelo and Donatello build a new type of residence for Todd and his rescue puppies. In "Portal Jacked," Todd Capybara has a picture in Run of the Mill Pizza that lists him as a "best customer."

• Señor Hueso (voiced by Eric Bauza) - A skeleton who uses his own left arm for a cane. He is the doorman and manager of the pizza parlor called Run of the Mill Pizza in New York's mystical Undercity. In "Portal Jacked," it is revealed that he is the brother of Capitán Piel. Señor Hueso's name is Spanish for "Mr. Bone."

• Bullhop (voiced by Dave Foley) - Stanley is a Canadian immigrant and bellhop who worked at a hotel that was actually a front for Big Mama's Battle Nexus. When the Oozesquitoes swarmed in the hotel, the Turtles tried to keep Stanley from getting stung only to fail. As a result of his consumption of beef jerky, Stanley is turned into a mutant bull and flees the hotel. After the Turtles try to make up for their mistake, he becomes their friend and develops advanced dancing skills. This character is a homage to Jerry Lewis' role in the movie The Bellboy.

• DIGG - A trio of girl rock musicians longing for their breakthrough. Turned into a mutant burrowing animal by the Oozequitoes during one of their gigs, they attempt a misguided scheme to win themselves an attentive debut audience by targeting the different pizzerias. With the Turtles' aid, they finally become an attraction as pizzeria musicians while also reuniting a family of pizza makers.
  • Prairie Dog (voiced by E. G. Daily) - A mutant prairie dog who is the group's lead singer and guitarist.
  • Ground Hog (voiced by Betsy Sodaro) - A mutant groundhog who is the group's dig-obsessed drummer. She has a tendency to say "dig" when she is burrowing.
  • Honey Badger (voiced by E. G. Daily) - A mutant honey badger who is the group's secondary guitarist. She is the strongest of the group.

• Sunita (voiced by Kody Kavitha, understudied by Evany Rosen in season 2) - A slime Yōkai that can explode and reassemble at will. She can assume a human form thanks to a special amulet. At the time of meeting April and the Turtles, Sunita was wearing metal boots that turned out to be a part of the Kuroi Yoroi leading her to be targeted by the Foot Lieutenant and the Foot Brute. In season 2, she can curse enemies.

• Frankenfoot (voiced by Rob Paulsen) - A patchwork Origami Ninja put together by Raph as a sparring partner. He becomes a permanent member of the team, even earning a Turtle insignia courtesy of Mikey.

• S.H.E.L.L.D.O.N. (voiced by Greg Cipes) - An A.I. invention that is devoted to its creator Donnie causing a disgruntled Raph, Leo, and Mikey to reprogram and thus inadvertently turning it against their brother. Don was able to fix it.

• Piebald (voiced by Chelsea Peretti) - A goldfish that is owned by Splinter and was accidentally flushed down the toilet by Leo months ago. After traversing through the sewers and nearly being eaten by Trash Wizard, Piebald swallowed an Oozesquito and mutated into her current form with camouflage abilities. She secretly returned to the lair and masterminds a scheme with Splinter to teach the Turtles a lesson actions by picking them, Splinter, and Frankenfoot off one by one.

• Gentry (voiced by Evanna Lynch) - A young Yōkai witch from the Hidden City's Witch Town district who befriends April and (though much less) Donatello.

• Baron Draxum (voiced by John Cena,[13][14] understudied by Roger Craig Smith in season 2) – A marooned-skinned Yōkai warrior and alchemist from the Hidden City with maroon hair (similar to Ruber from Quest for Camelot) and faun-like legs, who has the power to augment his own body by crushing purple pods in his hands, and can manipulate giant pink tentacle-like vines to grab objects, enemies, or as a means of transportation (similar to Poison Ivy from DC Comics). As the self-proclaimed protector of all mutantkind, Baron Draxum seeks to mutate humans into Yōkai so that he can live up to his title.[15] An incident amidst an earlier attempt to turn humanity into Yōkai led to the creation of the Teenage Mutant Ninja Turtles while causing Hamato Yoshi's transition into Splinter, attempting to win the former to his side before joining forces with the Foot Clan to reassemble the Kuroi Yoroi and revive Shredder. In "How to Make Enemies and Bend People to Your Will," Draxum exploits a loophole in the Foot's rules to becomes its leader through tactics that enable him to gain a shard of the Kuroi Yoroi that the Foot Lieutenant and Foot Brute failed to acquire. In the episode "End Game," Draxum equips the restored Kuroi Yoroi armor, with the intention of destroying humanity once and for all. The Foot Lieutenant and Foot Brute address him as Shredder, but he rejects the title, confused with the name "Shredder". Due to a Jupiter Jim action figure being wedged in a hole in the back of the helmet, the Turtles managed to attack that part and cause the armor to fall off of Draxum, though the armor is revived after siphoning some of Draxum's life force, degrading him into a barely-living, shriveled weakling. After the Foot Recruit emerged from the portal, Draxum used his weakened abilities to escape through it. In "Repairin' the Baron," Mikey takes in a weakened Draxum and teaches him to tolerate humans with Raph's help. After saving a mother and daughter from the ferris wheel during Garm and Freki's attack while losing his mask in the process, and slowly starting to regain his power, he starts to tolerate humans and Mikey gets him a job working at the cafeteria at April's school.
  • Huginn and Muninn (voiced by Timothy Simons and Sam Richardson[16]) – Two small gargoyles with retractable wings that are often seen sitting on Baron Draxum's shoulders. Huginn has a frog-like body and a cat-like head and tail while Muninn has a frog-like body and a tapir-like head. Their name and presence as Draxum's constant companions are a play on Odin's ravens Huginn and Muninn.

• Garm and Freki (voiced by Fred Tatasciore) – Two guardsmen warriors that work for Baron Draxum who are experts at armed combat. They can also ride giant demon-like dogs. In "Repairin' the Baron," Garm and Freki are offered forgiveness from the Council of Heads if they bring Draxum to the Hidden City to stand trial for his crimes. They are mentioned by Draxum to Mikey and Raph to be bounty hunters that work for whoever has the most money. Their names are a play on the wolf monster Garmr and Odin's wolf Freki.

• Oozesquitos – A swarm of mutant mosquitoes that are often used by Baron Draxum.[17] They store mutagen in their abdomens in order to inject anyone they bite which turn them into mutants. The Oozesquitoes are first seen when Draxum tests the mutagen on a delivery guy named Stewart. In the Turtles first encounter with Draxum, they accidentally unleash the Oozesquitos into New York City. In "Bug Busters," it is revealed that Big Mama uses the Oozesquitos so that they can fight for her entertainment in the Battle Nexus much to the annoyance of Draxum. In addition, he also had a hand in the Ninja Turtles' origins. As Draxum called them his "bugs," Huginn and Muninn stated that the Turtles called them Oozesquitoes, which is catchy to them.

• Foot Clan – A ninja clan seeking to resurrect the Shredder and take over New York City. They can make origami ninjas out of paper and have the power of teleportation through hidden gateways. In "Shadow of Evil", it is revealed that the Foot Clan uses a shoe store called the Foot Shack as a front for their activities. Most of its members have been fans of the Lou Jitsu films. In "How to Make Enemies and Bend People to Your Will," Baron Draxum took command over the Foot after exploiting a loophole in the clan's rulings of leadership. However, in "End Game" and "Many Unhappy Returns", it is revealed that the Foot were just manipulating Draxum into donning the Kuroi Yoroi so it could drain his life energy to reassemble and resurrect the Shredder.
  • Shredder - The original leader of the Foot Clan. 500 years ago, Shredder was originally a power hungry madman possessed by the demonic Kuroi Yoroi armor that swallowed his soul. It is unknown if the madman was Oroku Saki or an entirely different character. Shredder terrorized Japan until he was defeated by the Hamato Clan with his armor being broken into pieces and scattered across the world to prevent his return. The Foot and Baron Draxum began seeking out the fragments of the Kuroi Yoroi to reassemble it and resurrect the Shredder, the latter being tricked into wearing the armor so his life force can be siphoned. Shredder reconstitutes himself after the Turtles broke the armor off of Draxum, through as a feral beast due to something that went wrong with his resurrection. Big Mama provides a bauble for the Turtles and Splinter to trap Shredder in another dimension, though she makes a secret last-minute alteration to this plan.
  • Foot Lieutenant (voiced by Rob Paulsen) – A leading officer of the Foot Clan.
  • Foot Brute (voiced by Maurice LaMarche) – A buff member of the Foot Clan who works alongside Foot Lieutenant.
  • Foot Recruit (voiced by Zelda Williams) - An unnamed female member of the Foot Clan with a hyper-aggressive personality who debuted in "Hot Soup: The Game". In "How to Make Enemies and Bend People to Your Will," Foot Recruit assists Baron Draxum in getting a Kuroi Yoroi fragment from a statue in the botanical gardens so that she can be able to move up.
  • Jocelyn (voiced by Cree Summer) - A Foot Initiate who gains the mark of the Foot in "How to Make Enemies and Bend People to Your Will." Foot Recruit claimed to Baron Draxum that she got the mark because her parents are "big donors."
  • Foot Soldiers (Various Voices) - An army of ninjas that are associated with the Foot Clan.
  • Origami Ninjas – Ninjas made out of paper that are created by Foot Lieutenant and Foot Brute.

• Mutant Silverfish – A bunch of mutant silverfish. If they are attacked, the Mutant Silverfish will split into smaller silverfish that would later aggregate back to its original state.

• Meat Sweats (voiced by Johnny Rotten[18]) – Rupert Swaggart is a former celebrity chef who was turned into a mutant domestic pig upon being stung by an Oozesquito while hitting a failing contestant with a slab of pig meat during his TV show "Kondescending Kitchen." He wears gray gloves to conceal his tendril arms, which he uses to temporary absorb the abilities of any other mutants and wields a meat tenderizer in battle. Meat Sweats habitually makes any mutant he catches into his "meals" to strengthen the "flavor."[19]

• Albearto (voiced by Tom Kenny[18]) – An animatronic brown bear used at children's birthday parties in Albearto's Pizzeria.[20] After a small child short-circuited him, April had Donatello upgrade him where a stage mishap caused Albearto to get electrocuted and come to life. In "Al Be Back," Albearto returns where his head was salvaged by Baxter Stockboy in exchange for the cheat codes for the dance game. While on a car, he places his head on a new Albearto body in front of the birthday kids, gets the manager's hand print for the security scanner, and animates his bear "brothers" from failed franchises to attack Albearto Land where Albearto also animated the Albearto animatronics there. The Ninja Turtles put on a concert that Albearto and his animatronic "brothers" attend which causes them to explode since they couldn't stand the Ninja Turtles' singing.
  • Al-Beardo the Pirate (voiced by Tom Kenny) - An animatronic bear pirate with a hook for a right hand, an eyepatch over his right eye, and a left peg leg who is the mascot of a failed Albearto's British- and pirate-themed franchise called "Al-Beardo's Squid and Chips".
  • Bayou 'Bearto (voiced by Tom Kenny) - An animatronic bear hillbilly who is the mascot of a failed unnamed, Southern state-themed Albearto franchise.
  • Chef Albéar (voiced by Tom Kenny) - An animatronic bear who is the mascot of a failed Albearto's Pizzeria franchise called "La Petite Albear".
  • Otto von Bearto (voiced by Tom Kenny) - An animatronic bear who is the mascot of a failed Albearto's Pizzeria franchise called "Otto von Bearto's Best Wurst House."

• Warren Stone (voiced by John Michael Higgins[18]) – A semi-successful and narcissistic news anchor who mutated into a small mutant earthworm with an earthworm tail instead of legs after being stung by an Oozesquito.[20] If cut in half, Warren can regenerate. Since his mutation, he self-declared himself the greatest foe of the Teenage Mutant Ninja Turtles always ignore him. Warren Stone later gains a gauntlet that can shoot beams which he named Charlotte. This was later found to be one piece of the Kuroi Yoroi that was needed to revive Shredder. In "Warren & Hypno, Sitting in a Tree," Warren has become a roommate of Hypno-Potamus and also loses the gauntlet to Baron Draxum so that the Foot Clan can use it in their plot to revive Shredder. Though April does remember who Warren is since she was part of the Stoneheads.

• Hypno-Potamus (voiced by Rhys Darby[18]) – Mezmer-Ron is a successful stage magician and hypnotist who mutated into a hippopotamus after he was stung by an Oozesquito that merged him with his pet hippopotamus Doug.[20] Driven by envy, Hypno-Potamus strives to outachieve any magician with an even greater "trick" than they can produce, and find a way to bring Doug back to life, leading to his clashes with the Teenage Mutant Ninja Turtles. In "Warren & Hypno, Sitting in a Tree," Hypno-Potatmus has become a roommate of Warren Stone.

• Repo Mantis (voiced by Fred Tatasciore[18]) – The vicious, treacherous, and greedy owner of a salvage yard called Repo Mantis Salvage who was mutated into a purple mutant mantis after being stung by an Oozesquito. His mutation has not affected his salvaging business.
  • Mrs. Nubbins - Repo Mantis' pet cat who was stung by an Oozesquito and mutated into a cat/mantis hybrid due to having been in contact with her owner. Due to the mantis' nature, Mrs. Nubbins would try to eat Repo Mantis causing him to keep her locked up.

• Ghostbear (voiced by Jorge Gutierrez[18]) – A human masked wrestling champion in a white bear cape who cheats. Raphael was a fan of him until he learned the truth about his fighting techniques. In "Snow Day" while trying to get revenge on the Turtles for ruining his pro wrestling career, Ghostbear is stung by a defrosted Oozesquito and mutated into a mutant polar bear. This new form gives him the ability to become intangible.

• Mutant Cockroach Gang - An unnamed group of mutant cockroaches that posed as mascots.
  • Atomic Lass (voiced by Grey Griffin) - An unnamed mutant cockroach dressed as Atomic Lass.
  • Joey the Junkyard Dog (voiced by John DiMaggio) - An unnamed mutant cockroach dressed as Joey the Junkyard Dog.
  • Robot Vampire (voiced by Grey Griffin) - An unnamed mutant cockroach dressed as Robot Vampire.
  • Sergeant Woodpecker (voiced by Eric Bauza) - An unnamed mutant cockroach dressed as Sergeant Woodpecker.

• Baxter Stockboy (voiced by Ramone Hamilton) - An unpaid stockboy and self-proclaimed "internet celebrity" who is loosely based on Baxter Stockman. Both vengeful and avaricious, he strives to either profit from his live-streamed schemes or take revenge on anyone (particularly the Turtles) who hinders him in doing so.

• Mrs. Cuddles (voiced by Eliza Schneider) - A plush rabbit character from the TV series of the same name who comes to life to feeds on fear of her to become bigger and stronger. If someone laughs at her, Mrs. Cuddles loses her size and strength.

• Big Mama (voiced by Lena Headey[18]) – A cunning Jorōgumo who can change between her purple-skinned human form and her humanoid spider form and has a habit of using improper upper-class words when she speaks. She is the owner of an extradimensional gladiator arena called the Battle Nexus which is hidden in the secret sub-level of The Grand Nexus Hotel that is owned by her human form. Big Mama uses the Oozesquitos in her possession to mutate anyone into mutants so that they can fight for her entertainment in the Battle Nexus. Her plot has brought her into conflict with Baron Draxum who felt that Big Mama was misusing the Oozesquitos. Hinted in "The Ancient Art of Ninja Hide and Seek," the episode "Many Unhappy Returns" reveals that Big Mama was the ex-girlfriend of Hamato Yoshi and the indirect cause of his mutation when she abducted him to fight in the Battle Nexus.
  • Gus (voiced by Fred Tatasciore) - A mutant bulldog that is loyal to Big Mama who can grow spikes on his body. Gus is prone to partaking in a game of fetch.
  • Fox Bellhop (voiced by Eric Bauza) - An unnamed mutant red fox that works as a bellhop at Big Mama's Battle Nexus.
  • Octopus Elevator Operator (voiced by Nolan North) - An unnamed mutant octopus that works as an elevator operator at the Grand Nexus Hotel. In "Turtle-dega Nights: The Ballad of Rat Man," the Octopus Elevator Operator served as the announcer of the mutant demolition derby and was miscredited as the "Penguin Bellhop."
  • Otter Bellhop (voiced by Nolan North) - An unnamed mutant North American river otter that works as a bellhop at Big Mama's Battle Nexus.
  • Owl Bellhop (voiced by Fred Tatasciore) - An unnamed mutant barn owl that works as a bellhop at Big Mama's Battle Nexus.

• Purple Dragons - A trio of snobby, criminal tech club students at April's high school. They are skilled at computer hacking, high-tech theft, and other technology-based abilities.
  • Kendra (voiced by Tania Gunadi) - The leader of the Purple Dragons. She has known April since kindergarten. In "Breaking Purple," it is revealed that Kendra's dad married Jase's mom making them step-siblings.
  • Jase (voiced by Eugene Byrd) - Member of the Purple Dragons. He has a fear of cats and dogs. In "Breaking Purple," it is revealed that Jase' mom is married to Kendra's dad making them step-siblings.
  • Jeremy (voiced by Kyle Massey) - An African-American member of the Purple Dragons. He refers to Kendra as "chief."

• Sando Brothers - Two acrobats in a circus who were turned into mutant crabs by Oozesquitos. They can attack by launching their left claws at their opponents.
  • Ben (voiced by Paul Scheer) - Half of the Sando Brothers.
  • Carl (voiced by Jason Mantzoukas) - Half of the Sando Brothers.

• Capitán Piel (voiced by Christian Lanz) - A living skin who is the brother of Señor Hueso and the pirate captain of the S.S. Alexis. His name is Spanish for "Captain Skin."
  • Kraken Pirate (voiced by Eric Bauza) - A humanoid kraken who is a member of Capitán Piel's pirate crew.
  • Mermaid Pirate (voiced by Rob Paulsen) - A mermaid who is a member of Capitán Piel's pirate crew.
  • Sea Serpent Pirate (voiced by Maurice LaMarche) - A humanoid sea serpent who is a member of Capitán Piel's pirate crew.

• Makers of Brutality - The Makers of Brutality are a gang of ogres.
  • Boss Beverly (voiced by Gillian Vigman) - A one-eyed ogre who is the leader of the Makers of Brutality.
  • Ogre Henchmen (voiced by Gillian Vigman) - The unnamed henchmen of Boss Beverly.

• Masters of Barbarianism - The Masters of Barbarianism is a gang of reptilian creatures.
  • Boss Bruno (voiced by Vic Chao) - A humanoid Japanese dragon with an eyepatch over his left eye who is the leader of the Masters of Barbarianism.
  • Snake Henchmen (voiced by Eric Bauza and Vic Chao) - The unnamed humanoid snake henchmen of Boss Bruno who can attack like snakes.

• Dr. Alex Noe (voiced by Tony Hale) - A dentist obsessed with collectiong teeth from extremely rare or unusual creatures, including Raph's snaggleteeth.

• Sloppy Joseph - When an Oozesquito in Baron Draxum's possession gets loose in the kitchen, he and April trap it in a pot. This causes the Oozesquito to mutate the mystery meat concoction that Draxum made inside the pot to create a mutant that is named Sloppy Joseph. Sloppy Joseph can get bigger from every food that it consumes.

• Scor-Pion (voiced by John Kassir) - A zookeeper who was stung by an Oozesquito and mutated into a mutant scorpion after he was pushed into the scorpion habitat by his co-workers. Marcus Moncrief once mistook him for an alien.

• Mud Dogs - A group of criminals operating in the Hidden City who mistook Raph as Heinous Green.
  • Dastardly Danny (voiced by Rob Paulsen) - The leader of the Mud Dogs.
  • Loathsome Leonard (voiced by Seth Green) - A member of the Mud Dogs.
  • Malicious Mickey (voiced by Greg Cipes) - A member of the Mud Dogs.

• Heinous Green - A size-shifting green Yōkai who is one of the most wanted criminals in Hidden City. The Hidden City Police mistook Raph for this villain.

• Stewart (voiced by Fred Tatasciore) - Stewart is a food delivery man who accidentally fell into the Hidden City after mistaking a portal opened by Garm and Freki for a shortcut. He was then captured by Baron Draxum, who then used an Oozesquito to turn him into a mutant whitefish after which he runs off in a panic; his mutation refers to the fact his employers were committing food fraud, specifically the use of imitation crab in their crab cakes, which he claimed was real crab. In "Bug Busters," Stewart was seen fighting in the Battle Nexus where he engaged an octopus elevator operator in a slap fight.

• Clem (voiced by Eric Bauza) - The owner of a candy shop who can shift between a pink-skinned human form and a magenta mutant goat form. His shop is a front where he sells magical items. To access the magical items, the password one has to say is "wink", although it is easy to get the password as Clem often accidentally tells it to the customers.

• Trash Wizard (voiced by Eric Bauza) - A man who dresses as a wizard and likes to dramatically place himself in the Turtles' path (especially during high-speed pursuits) as he yells "You shall not pass!"

• Hidden City Police Officers (voiced by Eric Edelstein and Audrey Wasilewski) - The unnamed members of the Hidden City Police Department. The male one resembles a humanoid winged lion and the female one is an unspecified creature.

• Exploding Frankie (voiced by Eric Bauza) - A slime Yōkai that can explode and reassemble at will. He is the father of Sunita and works as a birthday entertainer at Run of the Mill Pizza.

• Stinkbomb (voiced by James Adomian) - Harold is the leader of the property caretakers of a botanical gardens who led his fellow caretakers in fighting the Foot Clan when they trespassed. After he saw that the corpse flower named Jewell was sliced, he rushed in and got it out in order to save it. To further his goals, Baron Draxum sent his Oozesquitoes who mutated Harold into a mutant corpse flower that started attacking both sides in order to get them off the grass.

• Bat Librarian (voiced by Gillian Vigman) - A four-armed bat-like creature who works at the Undercity's library.
  • Hush-Bats - A swarm of bats who work for the Bat Librarians. They will carry off anyone who makes a sound and place them in the kiddie room.

• Marcus Moncrief (voiced by Phil LaMarr) - An actor who portrays Jupiter Jim, the titular character of a long-running fictional science fiction adventure franchise. Secretly insane, he believes himself to be Jupiter Jim to the point of building fully functional versions of his Jupiter Jim movie weapons, paralyzing his own fans, and dressing them up as trophies for his private Jupiter Jim museum.
  • Red Fox (voiced by Lauren Lapkus) - A red panda-type Yōkai with a prehensile tail who was Marcus Moncrief's co-star in the Jupiter Jim movies. She left after not being respected by Marcus. Leo, Mikey, and Donnie once encountered her at the theater that was doing a Jupiter Jim musical where she worked to deny any knowledge that she is a Yōkai. Red Fox later saved Marcus and Raph from Scor-Pion's trap. Afterwards, Marcus thanked Red Fox for saving him which Red Fox finally got from him.

• Council of Heads (voiced by Susan Blu, Peter Cullen, and Frank Welker) - A trio of stone heads that run the Yōkai community. They are against Baron Draxum's plot to mutate humanity and sent Agent 64/Mayhem to spy on him. In the episode "Reparin' the Baron", the Councilors are furious at Draxum for everything he has done. However, they promise to forgive Garm and Freki, Draxum's former servants, for their assistance in his crimes only if they bring the Baron to the Hidden City to stand trial.

• Loose Lips Malinowski (voiced by Russ Carney) - A fence constantly on the lookout for easy money. As his nickname signifies, he is prone to unconsciously spilling his beans to anyone asking him a direct question about his dealings.

• Mayor Mira (voiced by Kathy Najimy) - A witch who is the mayor of the Hidden City's Witch Town district.

In April 2018, it was announced that IDW would publish a comic book based on the series, beginning in July 2018.[72] The comics concluded with an introductionary issue (#0), a five-issue main story and a Halloween Comicfest special. After a period of inactivity, it was continued with a three-issue story arc titled "Sound Off!" from July to September 2019.

On February 16, 2018, the first toys based on the series were presented during the New York City Toy Fair.[73] The first Rise of the Teenage Mutant Ninja Turtles toys are expected to be released on October 1, 2018, but are starting to leak out on store shelves on September 20, 2018.[74]

In August 2018, the American fast food chain Sonic Drive-In released a set of kids meal toys based on the series, which were available in their Wacky Pack meals.

During the months leading up to the series' launch, Viacom and Nintendo collaborated to market Rise of the Teenage Mutant Ninja Turtles via a special limited-time online multiplayer event for the 2017 video game Splatoon 2, in which Inklings can participate in a Splatfest tournament, battling over which of the four brothers is the best. Donnie won overall, beating Mikey in the first round, and Raph (who had in turn beat Leo) in the finals.[75][76]

Nickelodeon and Paramount Home Entertainment are currently releasing single-volume DVDs of the series, each containing 6-7 non-sequential episodes.