Mighty Morphin Alien Rangers

The series sets up the transition from Mighty Morphin Power Rangers to Power Rangers Zeo. The two-part premiere of the latter resolved the cliffhanger ending and established the Rangers' new powers (as well as new foes, the Machine Empire).

The Aquitian Rangers are later seen or referenced in further seasons. Cestro returns unmorphed in "Graduation Blues", seeking Billy's help against the Hydro-Contaminators. Cestro later briefly appears with Delphine in "Revelations of Gold". The Aquitian and Zeo Rangers team-up in the "Rangers of Two Worlds" two-parter, the first instance on the series of two full teams appearing together. The two-parter also centered around Billy rapidly aging because of his use of the regenerator. In "Countdown to Destruction" in Power Rangers in Space, the Aquitian Rangers battle and are overwhelmed by Divatox's forces. Aurico later appears morphed in the Power Rangers Wild Force episode, "Forever Red", which saw every previous Red Ranger (save Rocky, as Jason returned to his previous role as Red Ranger, for which Rocky originally replaced him) united to stop the remnants of the Machine Empire. All five Rangers would later return in the series finale of Power Rangers Super Megaforce to battle alongside other veteran Ranger teams and the Megaforce Rangers.

• Aurico
  The Red Aquitian Ranger, portrayed by David Bacon. As field commander and second-in-command of the Alien Rangers, Aurico leads the Rangers in battle, and devises strategies that ensure victory. His symbol is the circle and he uses ninjutsu to vanish from one place and appear in another to dodge his enemies. He pilots the Red Battle Borg and, during his stay on Earth, the Red Shogunzord, as well. Years later he joined nine other Red Rangers to fight the Machine Empire on the moon. He did not appear unmorphed in this episode, and was voiced by Christopher Glenn.
• Cestro
  The Blue Aquitian Ranger, portrayed by Karim Prince. Cestro is the brains of the team. A master of technology, he creates weapons and devices that get the Aquitian Rangers out of tough situations. He is entrusted with the power of the Blue Battleborg and Blue Shogunzord. The Blue Aquitian Ranger's symbol is the square. His special attack is called the Aquitar Water Fall.
• Tideus
  The Yellow Aquitian Ranger, portrayed by Jim Gray. He is a very strong and levelheaded individual. He is also the first male Yellow Ranger, a tradition which occurs frequently in the Sentai counterpart, but does not happen again in the American releases until Dustin becomes the Yellow Wind Ranger in Power Rangers Ninja Storm several years later. Tideus was entrusted with the power of the Yellow Battle Borg and the Yellow Shogunzord. The Yellow Aquitian Ranger's symbol is the triangle. He can send yellow triangular energy beams at his enemies (created by slashing his sword through the air in a triangular motion).
• Corcus
  The Black Aquitian Ranger, portrayed by Alan Palmer. He is the quietest member of the team, often lurking in the background, but fights with extreme ferocity against his enemies. The Black Aquitian Ranger's symbol is the pentagon. He controls the Black Battle Borg and the Black Shogunzord.
• Delphine
  The White Aquitian Ranger, the leader of the Alien Rangers. She's portrayed by Rajia Baroudi. She is the first female leader and White Ranger. Her symbol is the arrow (left-pointing on her helmet's forehead, downward-pointing on her visor). She pilots the White Battleborg and the White Shogunzord. Delphine has more endurance and can survive far longer outside of water than her team.

• Billy Cranston
  He is portrayed as a child by Justin Timsit and as a teenager by David Yost.
• Thomas "Tommy" Oliver
  He is portrayed as a child by Michael R. Gotto and as a teenager by Jason David Frank.
• Rocky DeSantos
  He is portrayed as a child by Michael J. O'Laskey and as a teenager by Steve Cardenas.
• Aisha Campbell
  She is portrayed as a child by Sicily Sewell and as a teenager by Karan Ashley.
• Adam Park
  He is portrayed as a child by Matthew Sakimoto and as a teenager by Johnny Yong Bosch.
• Katherine "Kat" Hillard
  She is portrayed as a child by Julia Jordan and as a teenager by Catherine Sutherland.
• Tanya Sloan
  She is portrayed as a child by Khanya Mkhize and as a teenager by Nakia Burrise
• Zordon
  He is voiced by Robert L. Manahan.
• Alpha 5
  He is voiced by Richard Steven Horvitz (credited as Richard Wood).
• Farkus "Bulk" Bulkmeier
  He is portrayed as a child by Cody Slaton and as a teenager by Paul Schrier.
• Eugene "Skull" Skullovitch
  He is portrayed as a child by Ross J. Samya and as a teenager by Jason Narvy.

• Master Vile
  He is voiced by Tom Wyner.
• Rita Repulsa
  She is portrayed by Carla Perez and voiced by Barbara Goodson.
• Lord Zedd
  He is portrayed by Edwin Neal (credited as Ed Neil) and voiced by Robert Axelrod.
• Goldar
  He is voiced by Kerrigan Mahan.
• Rito Revolto
  He is voiced by Bob Papenbrook.
• Squatt
  He is voiced by Michael Sorich (credited as Michael J. Sorich).
• Baboo
  He is voiced by Dave Mallow (credited as Colin Phillips).
• Finster
  He is voiced by Robert Axelrod.
• Hydro Hog
  He is voiced by Brad Orchard.
• Monsters (note: all voice actors uncredited)
  • Parrot Top
    He is voiced by Matt K. Miller.
  • See-Monster
    He is voiced by Brian Tahash.
  • Crabby Cabbie
    He is voiced by Michael Sorich.
  • Garbage Mouth
    He is voiced by Matt K. Miller.
  • Brick Bully
    He is voiced by Richard Epcar the first time and by Brian Tahash the second time.
  • Professor Longnose
    He is voiced by Kirk Thornton.
  • Slotsky
    He is voiced by Jimmy Theodore.
  • Eric and Merrick, The Barbaric Brothers
    Voice actors unknown.
  • Bratboy
    He is voiced by Paul Schrier.
  • Witchblade
    She is voiced by Wendee Lee.
  • Arachnofiend
    She is voiced by Julie Maddalena.

• Battle Borgs
  Humanoid Zords used by each Aquitian Ranger that were brought with them from Aquitar to Earth. They are less armored and more agile versions of the Shogunzords (like in Kakuranger). They were controlled through telepathy.
• Shogunzords
  The Aquitian Rangers also had access to the original Power Rangers' Shogunzords and were able to form the Shogun Megazord (most of the monsters they fought were eliminated this way). Along with the Falconzord, they could form the Shogun Mega Falconzord, which they used to defeat their most feared nemesis, the Hydro Hog.

• Alien Power Coins
  The Aquitian Alien Rangers were given Power Coins by Ninjor, 1,000 years ago, though it is unknown if he granted them the ability to morph into Power Rangers or even when the Aquitian Rangers received the power. Unlike the others, the Aquitians drew their power directly from their Coins in order to morph, as they did not need to use a Morpher.
• Aquitian Saber
  The main weapons used by the Alien Rangers in Season 3. They worked identically to the Earth-made Katana when in use, but had strange alien markings inscribed upon the blade, presumably to grant it greater cutting ability.
• Aquitian Laser
  Small laser guns that could turn into a knife by removing the sheath.
• Aquitian Fist
  A knuckle device.