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Main characters

TMNT1987Series

The main cast

These are the core characters of the series and appear in nearly every episode. However, after Season Eight, most of the main characters aside from the Turtles, April, and Splinter were removed from the show, although Krang and Shredder would return for three episodes in Season Ten.

  • The Teenage Mutant Ninja Turtles:
    • Leonardo: Turtle with the blue bandana who wields two katanas. Being the leader of the Turtles, he is the most serious member of team, and the most talented fighter. Voiced by Cam Clarke. He is a charming character, with a super hero attitude, but his role as responsible leader was the source of contention to the other turtles in several episodes. He had a brief romantic interest in a Japanese girl named Lotus Blossom.
    • Donatello: Turtle with the purple bandana who wields a bo staff. He is interested in science and is constantly tinkering with various inventions. Voiced by Barry Gordon, but is some Season 3 episodes and a Vacation In Europe Side season episode voiced by Greg Berg. A running gag was that most of his inventions exploded or otherwise malfunctioned, but it was still Donatello who came through to save the day most of the time. Donatello was the turtle with the most vocal negativity towards humans. Irma seemed to be more interested in him than any of the other turtles.
    • Raphael: Turtle with the red bandana who wields two sais. He's sarcastic, often jokes, and seems to get irritated easily. Voiced by Rob Paulsen, but in Vacation In Europe Side season, voiced by Hal Rayle, and voiced by Michael Gough in Season 10. Unlike later versions of Raphael, he is not a hothead, and is the main source of comic relief. He's generally lazy and doesn't want to fight at times all while remaining sarcastic. Raphael's love interest in the series was a female lizard named Mona Lisa but she was only seen in one episode.
    • Michelangelo: Turtle with the orange bandana, who wields two nunchuks but later wields a grappling hook. He is the most relaxed of the group, mostly interested with pizza and having a good time. He used a lot of slang, and is the source for many of the catch phrases such as "Cowabunga!". He was voiced by Townsend Coleman in every episode. He is often teased by his brother Raphael in many episodes and at times he cross dresses to fool many villains. He had a crush on a Neutrino girl named Kala.
  • Hamato Yoshi/Master Splinter : A strict and wise sensei, he is the mutant rat who trained the Turtles in ninjutsu. He was voiced by Peter Renaday. As opposed to later depictions, this version of Splinter treats the Turtles like students more than his sons, as well as being Hamato Yoshi and becoming a rat, whereas in most other versions, he is Yoshi's pet rat that becomes humanoid. When he's not calling the turtles by their names he calls them his "students" or "my turtles". He once yearned to be human, but after a incident with retro mutagen, he decided it was best to stay mutated.
  • April O'Neil: A red-headed Channel 6 TV reporter who discovers the Turtles' home in the sewers. She befriended the turtles in the very first episode. She is also known for wearing a yellow jumpsuit, except for the Red Sky episodes. April O'Neil was voiced by Renae Jacobs. This is the first version where April is a news reporter and it continued in other versions. She often puts her self in danger just to get her story and hardly had any love interests in the series. In the final two seasons, she became a freelance reporter.
  • Irma Langinstein: A Channel 6 TV associate and April's best friend. Irma is preoccupied with men, but is also a friend to the TMNT from late season 2 onwards. Voiced by Jennifer Darling. She's also very clumsy and frequently gets into dangerous predicaments.
  • Vernon Fenwick: An egotistical, self-righteous, misogynistic coward who is also a reporter at Channel 6 and is April's chief rival. He dislikes the Turtles and generally reports negative stories blaming them for various things in the city. Vernon was voiced by Peter Renaday. At various points in the series, Vernon has been portrayed as analogous to Geraldo Rivera.
  • Burne Thompson: Channel 6 NEWS producer and April, Vernon, and Irma's boss. He dislikes the Turtles and blames them for everything that goes wrong and encourages his reporters to broadcast negative stories about them, similar to J. Jonah Jameson from Spider-Man. Burne was voiced by Pat Fraley. He once had a girlfriend named Tiffany, who also hated turtles in general.
  • Casey Jones: A vigilante, and also a friend of the Turtles. Casey wears an ice hockey goaltender's mask (which is never removed in the series) and carries a wide assortment of unorthodox weapons including golf clubs, baseball bats, and cricket bats and on one occasion a sword. Voiced by Pat Fraley. Compared to his other incarnations, this version parodies a Dirty Harry-like persona and is quite a psychopath. His trademark tagline..."All I wanna know is when do I get to break something?!".
  • Carter: Introduced in season nine, he comes to New York to study martial arts under Splinter. He is accidentally exposed to a sample of the mutagen that mutated the Turtles, which causes him to spontaneously mutate between his human and mutant form for a short time, which the Turtles tried to help him with. Carter is voiced by Bumper Robinson. After helping the Turtles many times against Dregg in Season Ten, Carter decides to return to College and Donatello is able to stabilize his mutation. Shortly after he leaves, Carter briefly comes back to aid the Turtles one last time against Dregg before traveling to the future with the turtles allies Landor and Merrick so he could be fully cured of his mutation.
  • Zach: An adolescent boy who loves the Turtles and wants to be one. The Turtles refer to him affectionately as "The Fifth Turtle". Zach was voiced by Rob Paulsen. He is the only character that was not able to endure the feather tickling torture of Don Turtelli. He is occasionally accompanied by his older brother Walt.

Recurring characters

This is a far from complete list of recurring characters or, characters that played a substantial role in the plots of more than one episode. The characters are arranged by frequency of appearance.

  • Usagi Yojimbo: A Samurai rabbit from another universe's 16th century Edo Period Japan where animals are the dominant species, not humans. Usagi Yojimbo is a comic book series created by Stan Sakai starring a ronin rabbit, Miyamoto Usagi; apparently the TV show writers did not understand the distinction and misnamed the character after the comic book. He was voiced by Townsend Coleman. He's only in two episodes. This version of Usagi has a good friendship with Michelangelo and tends to act silly in a world he doesn't understand. His weapon of choice is a sword just like Leonardo.
  • Neutrinos: 1950s-college-kid type people in flying cars called Star mobiles (complete with tail fins), from Dimension X. Their names are Dask, Kala, and Zak. Friendly to the Turtles, they even once left the Turtles one of their Starmobiles, but unfortunately neglected to mention it ran on plutonium. Kala, the lone female of the trio, is often shown to be affectionate to Michelangelo (who likewise had a crush on her), but it never clearly develops into full romantic relationship. They return at some points in the series, usually when it involves dimension x.
  • Lotus Blossom: A female ninja hired by Krang to destroy the Turtles. She developed a respect for Leonardo and tried to get him to become her partner. Lotus was voiced by Renae Jacobs. She is only seen in the episodes called Beware the Lotus in season three, and Farewell to Lotus Blossom in season four.
  • Metalhead: Built by Krang in a plot to destroy the Turtles, Metalhead was a robot Ninja Turtle whose programming consisted of all the Turtles' personalities. Prone to malfunction, he was re-programmed by the Turtles and spent most of the series in Donatello's closet. Metalhead was voiced by Dorian Harewood (Shredder's alternate voice), Townsend Coleman (Michelangelo's voice), Rob Paulsen (Raphael's voice), Barry Gordon (Donatello's voice), Cam Clarke (Leonardo's voice), Pat Fraley (Krang's voice), and Renae Jacobs (April's voice).
  • Polarisoids A race of aliens from the planet Polaris who according to Krang, are known for being "the universe's most annoying tourists", as their cameras don't just take pictures of what they photograph, but also imprison them within the camera.
  • Brick Bradley/Bugman: Michaelangelo's comic book hero come to life, Bugman is half man-half-insect. Bugman is a parody of Spider-Man and other comic book superheros. He was transformed into a superhero by a laboratory experiment gone awry, has a secret identity, and he has a vulnerability to the metal Leestanite.
  • REX-1 (Robotic Enforcement EXperiment): An experimental robot built by the New York City authorities to replace human policemen. The Shredder used computer hacking to steal the plans for REX-1 and build an army of robots.
  • 'Donald J. Lofty: A Donald Trump-esque character who owns Lofty Tower. He is one of the few humans other than April O'Neil, Irma Langenstein, and Zach who trusts the turtles as heroes.
  • Turtleoids A race of peace-loving turtle-like aliens who are energized by gold.
    • Kerma A Turtleoid who befriends the turtles. He first calls their help to defeat the two-headed dragon Herman the Horrible. In his second appearance, the turtles had to protect him from a robotic bounty hunter named Destructor X that mistook him for a wanted criminal. Kerma's third and final appearance had him recruiting the turtles' help to protect the planet from Dirtbag, Groundchuck, and their new boss Captain Dredd.

Minor characters

The series had myriad minor characters, or characters that were not part of the main cast or involved in the majority of plots. These characters generally went along with the show's theme of anthropomorphic animal fighters often mutated in a way similar to the Turtles. As was the trend with cartoons during the end of the TV era of animation, a considerable number of characters who appeared briefly, once, or never at all in the series were made into action figures.

  • Algernon: A lizard from another planet. Algernon's home planet orbits a star in the Turtle Nebula, a nebula in the shape of a turtle. Algernon's spaceship crashed on the Earth, and Algernon helped Donatello defeat the businessman Hiram Grelch, who tried to take over TV stations in New York City.
  • Mondo Gecko: A lizard who was actually in the sewers when the Turtles mutated, and also mutated himself, but was picked up and carried away by a crime boss before Splinter found the Turtles. He was raised by criminals led by Mr. X and trained to commit robberies and other crimes. Michaelangelo met Mondo during one episode and talked him over to the side of the Turtles. Mondo then supposedly came to live with the Turtles in the sewer "right next door". After his first appearance, however, he was never seen again, save for the episode "Dirk Savege: Mutant Hunter", where he lets himself get captured by Dirk Savage so that the turtles can rescue their captured mutant allies.
  • Caitlyn: Female friend of Zach, who appears in the episode The Great Boldini. She and Zach help the Turtles prevent Rat King and Don Turtelli from carrying out their plans. Voiced by Maggie Roswell.
  • Gadgetman: A retired hero, tries to return to crime fighting in the episode "Super Hero for a Day." After helping the turtles defeat the Shredder, he decides to go back to retirement, but agrees to help them design new crime-fighting gadgets. Burne Thompson admits that he was his favorite hero when he was a kid, as do Bebop and Rocksteady despite them being villains now.
  • Lieutenant Kazuo Saki: Shredder's younger brother. Kazuo Saki works as a policeman in Tokyo, Japan. Voiced by Peter Renaday. In the Mirage comics Shredder has an older brother named Oruku Nagi but in this series Shredder is the older brother.
  • Klaatu, Barada & Nikto: A family of aliens. Klaatu is the patriarch, Barada is the matriarch, and Nikto is their son. They visited Earth (and abducted Donatello and Rocksteady in the process) to retrieve one of Nikto's toys that - if left unchecked - might destroy the world.  They, themselves, are pacifists, despite owning technology that attracted the interest of Shredder.
  • MACC (Mobile-Armored Computerized Combatant): A robot from 400 years in the future who traveled back in time by accident.  MACC abhors violence, despite having been programmed to be a soldier.  His favorite - and, perhaps, only - pastime is watching old western movies; as a result of having nothing else to do but watch them, MACC occasionally speaks with the accent and expressions one would expect from a movie cowboy.  Krang tried to re-program MACC to destroy the Turtles, but failed, and MACC was sent home to the future. MACC was voiced by Peter Renaday.
  • Princess Mallory: Princess from the fictional state Malicuria, daughter of Emperor Aleister. The Shredder tried to kidnap her from at party at the Malicurian Embassy in the USA and give her back in exchange for Lydium 90, a metal Krang wanted to re-power the Technodrome. She looks exactly like April, who is kidnapped instead of her. Voiced by Renae Jacobs.
  • Mona Lisa: A mysterious female mutant who was once human. Working with Raphael, the two of them thwarted the plans of Captain Filch, a pirate, to hold the passengers of a yacht for ransom. When she first appeared, it seemed like she would become a regular character, possibly Raph's girlfriend, but this did not happen since she made no further appearances. Voiced by Renae Jacobs.
  • Muckman and Joe Eyeball: Two trashmen mutated with garbage. Their radiation weakened the Turtles. April convinces them that Bebop and Rocksteady were responsible for their condition, so they help the Turtles to find a cure and turn against the Shredder. When Donatello offers to find a cure to their mutation, Muckman tells him to take his time, as the two apparently prefer being mutant heroes to trash-men.
  • Seymour Gutz/Mutagen Man: A geeky deliveryman who fell into a vat of mutagen. He has a brain/skull head and a containment suit. He has the ability to shape-shift into anyone. Shredder promises him a cure in exchange for components to make more mutagen. After the Shredder's betrayal, the Turtles infuse him with a dose of mutagen that changed his appearance; which was into that of a charming lady's man. It's interesting to note that while impersonating anyone, his voice also mimicked that person whereas his final form had his original voice. Voiced by Rob Paulsen.
  • Octavious Ogilvy: President of the company Octopus Inc. Worked with the Shredder until he realized that the Shredder was a bad guy who tried to brainwash businessmen. Because Octavious Ogilvy had a hearing disability, he couldn't be brainwashed because his hearing aid didn't work. Instead, Shredder locked him in a room.
  • Shibano-Sama: Founder of the Foot Clan in Feudal Japan. When his burial urn was in the Asian-American Cultural Center, Shredder tried to open it so Shibano-Sama could teach Bebop and Rocksteady ninja skills. However, he shunned Shredder and stripped his henchmen of their powers after Splinter demonstrated the final secret techniques of the Foot, which Shredder didn't know. Oddly enough, the final Foot Techniques parodied Three Stooges slapstick, the "Kur-Li Maneuver". Voiced by James Avery.
  • Speega: A Tyrannosaurus leader who, along with a Triceratops and Pachycephalosaurus, are descendants of a group of dinosaurs that escaped extinction millions of years ago by escaping to the center of the earth. They have been on a mission to save endangered species ever since.
  • The Grybyx: A pet of the Neutrinos. He may look cute at first, but when fed the wrong food, grows into a large monster. He will only return to normal when exposed to cold water.
  • Tiffany: Burne's beautiful girlfriend.  She loathes turtles after a traumatic childhood incident involving a turtle her brother placed in her bed. Voiced by Jennifer Darling.
  • Buffy Shellhammer: 15-year-old CEO of Shellhammer Chemicals.  She acquired the company after her grandfather passed away.  She is often rude and bratty to others, but has a soft spot for her late grandfather and would eventually befriend the turtles after Shredder and Krang attempt to kidnap her.  Voiced by Jennifer Darling.
  • Dr. Jane Goodfellow: A zoologist who reluctantly helps Michelangelo stop Dr. Leasseau and his schemes involving mutant animal hybrids.
  • Pete: Michaelangelo's pet pigeon.
  • Blodgett An unlucky employee of Channel 6 who got fired for losing one of its vans. After finding the Eye of Sarnath and helping the Turtles destroy it, he was rehired, but had the expenses of replacing the van he lost taken out of his salary.
  • Clayton Kellerman The host of a talk show called On Trial with Clayton Kellerman. He badmouths the turtles and claims they are a menace to the city. Aggravatingly enough, he decides to continue painting the turtles as a menace even after they save his life.
  • Professor Willard W. Willard]] A clumsy and near-sighted scientist who worked on a growth ray that enlarged his lab monkey Jocko.
  • Oswald Dren: A college student who worked on a vitalizer, a chemical able to bring inanimate things to life.
  • Rondo: A cowardly movie star who plays a brave hero. His movie self was brought to life by Oswald Dren's vitalizer.
  • Billy Jim Bob: A country boy who befriended Leonardo and mistook him for an alien.
  • Dickie Bark: Also known as the Woofman. Host of a popular pirate radio station called W.O.O.F.
  • Professor Chumley: A scientist who invented a machine capable of repelling magnetic objects. When Bebop and Rocksteady tried to steal it, it accidentally hit Irma with a blast and temporarily gave her magnetic powers.
  • Foster Fenwick: Vernon Fenwick's genius nephew. Saw Professor Sopho as a role model until he found out that he was a supervillain.
  • Milton Frobish III: Nervous and clumsy son of Channel 6's CEO Milton Frobish II. He once volunteered to work for Channel 6. Eventually, he was injured by Vernon, who blamed the accident on April and Irma. Milton II responds by rewarding the girls with a vacation, believing that his son should go to medical school to become a doctor instead.
  • Bogart Flywheel: A scientist who made the animatronics at the Willy Wombat pizzeria. After a fight with the CEO Rufus Higby, a chemical splashed on his face and disfigured him. Since then, he went into hiding and donned the identity of the Phantom of the Sewers, sometimes going to the Willy Wombat pizzeria to visit his animatronics, which he considered his children. He helped the turtles bring Rufus Higby to justice when he learned that the animatronics were being reprogrammed to rob banks. After unmasking himself, Flywheel learned that the chemical that "disfigured" him was really paint. His face was unmarred the whole time!
  • Quarx: An alien child who loves to cause mayhem and play with everything he finds but he also has destructive powers, he refused to grow up because his father had died years earlier, after Splinter convinces him that he is speaking for his father he decides to grow up and apologizes for his behavior, offering to help the aliens repair the damage he caused. His child form was voiced by Elizabeth Daily and his adult form was voiced by Cam Clarke.
  • Merrick: Quarx's father. He gave his son powers to help him end an intergalactic war, but was implied to have died before he could tell him. Splinter found out about Merrick's intentions from Quarx's ship's video archives and disguised himself as Merrick to convince Quarx to grow up.
  • Hamato Koji Hamato Yoshi/Splinter's ancestor and founder of the Foot Clan. He formed the Foot Clan by gathering together honorable warriors and obtaining a katana and a chest containing a dragon from the shrine of Shibano-Sama.
  • Master Mogo-San: Master Splinter's sensei.
  • Yoku: Master Mogo-San's grandson and a secret police agent. He pretends to join the Black Heart Ninja Gang to arrest all of them.
  • Dirk Savage: A mutant hunter hired by billionaire A. J. Howard to capture mutants and also had some experience working for the government and the military. Considering that many of the turtles' friends and allies are mutants, it was inevitable that the four ninja teens would get involved. The turtles eventually freed all the mutants he captured and convinced him that not all mutants were bad. Savage then helped the turtles defeat A. J. Howard when it was revealed that he had become a slug mutant and was capturing mutants as part of a scheme for world domination.
  • Atlanteans: A race of people from the sunken city of Atlantis. They appeared in two episodes of the series, but both appearances contradict each other.
    • Alim Coelacanth: A fish-like Atlantean who left home centuries ago and ran into the turtles. Michelangelo nicknamed him Merdude. He was eventually revealed to be the destined ruler of Atlantis.
    • Malathar: A wise and elderly Atlantean.
    • Hepax Lagamina: An Atlantean woman who became Alim's advisor when he was crowned King of Atlantis.
  • Weazel & Zwerk: A pair of brothers from Dimension X. Weazel worked in the slave trade and attempted to sell the turtles as slaves until he saw that his little brother Zwerk had become a slave. The turtles help him rescue his brother.
  • Commander Korak: Leader of the Glaxxons.
  • Glaxxons: A group of warrior aliens who had recently obtained a powerful artifact called the Firestar. After a run-in with the turtles, Shredder, and Krang, the Glaxxons decided to dispose of the Firestar and became peace-loving individuals.
  • Colonel Wesley Knight: A member of the police agency Dark Water.
  • Krakus: A policeman from the future bent on capturing Titanus, leader of the mutant organization H.A.V.O.C. His father's life was saved by April O'Neil.
  • Gargon: Appeared in Turtle Trek! An inhabitant of Dimension X that Krang had kept as a prisoner and used to test an experimental mutagen, mutating him into a monstrous form. Despite being a cowardly pacifist, Gargon eventually helped the turtles defeat Shredder and Krang for good by destroying the Technodrome, leaving the villains stranded in Dimension X for good. Gargon managed to be restored to his normal form and returned to his home planet.
  • Landor & Merrik: Two people from the future (Landor is a Caucasian blond man, Merrik is an African American woman). They are children in present day New York, and are both shown playing in the sandbox, implying that they are friends. They first appeared to in Carter, the Enforcer, where they went back in time to warn the turtles that Carter would betray the turtles and side with Lord Dregg. It turned out that the treacherous Carter was really a robotic double, which was destroyed by the real Carter. They returned in the season 10 three-parter that brought back Shredder and Krang, where they helped the dying turtles that were robbed of their life-forces by bringing their counterparts from the past to give a life force transfusion. At the end of the three-part episode, they take Carter with them in the future to cure his mutation. It was never revealed if their attempts in curing Carter's mutation were successful.
  • Dr. Floyd O'Toole: A scientist who quit his job to become an insurance salesman when he got tired of villains stealing his inventions to use for evil.
  • Professor Alvin Huxley: A scientist who invented a protein computer that Lord Dregg stole.
  • DUMP 1000 (Disposal Unit Main Processor 1000): A garbage-collecting robot that Shredder reprograms to capture turtles. The Teenage Mutant Ninja Turtles eventually return it to normal.

Main Villains

  • Shredder/Oroku Saki: Arch-villain of the Turtles and Splinter. The Shredder wears a suit covered in metal blades, a cape, and a metal helmet and mask which he rarely takes off. Voiced by James Avery, but in some Season 3 episodes, voiced by Dorian Harewood, in some Season 5 episodes and most of Vacation In Europe, voiced by Jim Cummings, and in most of Season 7, voiced by Towsend Coleman, and in Red Sky seasons, voiced by Bill Martin. Unlike other incarnations, this Shredder is associated with a disembodied alien called Krang, and plans to take over earth along side him with his armored fortress the Technodrome, which is also there headquarters.
  • Krang: A disembodied brain who was a warlord in Dimension X before he was exiled and had his body taken away. Krang usually resides inside a large robot body and controls it from a compartment in the abdomen area, or uses a "bubble walker". Voiced by Pat Fraley. He also commands the Technodrome, an enormous mobile fortress used as his and Shredder's headquarters. He also funds and helps plan most of Shredder's schemes. The character Krang was inspired by the original comics' "Utroms", who were also small, squishy aliens, but by contrast, did good deeds on Earth.
  • Foot Soldiers: Ninjas led by the Shredder. Unlike other incarnations, the foot ninjas are robots though they were human before shredder joined forces with Krang.
    • Alpha One: A Foot Soldier in the episode "The Foot Soldiers are Revolting" who turned against Shredder after his intelligence was increased. He led the other Foot Soldiers to rebel against Shredder and Krang. He was eventually banished to an unknown dimension. Alpha One is the first and only Foot Soldier to speak and be given an individual name.
  • Rock Soldiers: Krang's rock bodied soldiers in Dimension X. They sometimes work alongside the Foot Soldiers.
    • General Traag: General of Krang's army of Rock Soldiers from Dimension X. Many plots involve Krang almost bringing them to Earth, but failing miserably in the end. He was voiced by Peter Renaday.
    • Lieutenant Granitor: Lieutenant of Krang's army of Rock Soldiers from Dimension X.
  • Lord Dregg: In the eighth season's last episode, "Turtle Trek", Krang, Shredder, Bebop, and Rocksteady are trapped in Dimension X and the Technodrome is rendered inoperable. In the ninth season, the alien Lord Dregg is introduced as the Turtles' new main adversary, with a plan to conquer Earth. Lord Dregg was voiced by the late Tony Jay. He first tries to take advantage of the humans in New York believing the turtles to be enemies by pretending to be a benevolent hero. His facade lasted until the season finale, where the turtles revealed his true intentions to the public. The tenth and final season had him trying to destroy the turtles until he is banished to Dimension X in the final episode.
    • HiTech: Leader of the TechnoGangsters. He used to be Lord Dregg's right-hand man until season ten where he was betrayed by Dregg himself and shot into space. In season nine HiTech was voiced by Rob Paulsen. And in season ten he was voiced by Cam Clarke.
    • Mung: He becomes Lord Dregg's right-hand man in "The Return Of Dregg", replacing his former right hand man, HiTech. In the last episode, he realizes that Dregg has gone mad with his obsession to eliminate the turtles, and is implied to be left for dead. Mung was voiced by Cam Clarke.
    • TechnoGangsters: Lord Dregg's insect foot soldiers in the ninth season.
    • Batmen: Lord Dregg's bat foot soldiers in the tenth and last season.

Recurring Villains

  • The Rat King: A human inhabitant of the sewers with the ability to communicate with rats. He also hypnotized Splinter to attack the Turtles. Extremely unusual for this series (which is typically morally absolute), his role of either good guy or bad guy is sometimes blurry. While he is sometimes involved in some plot to destroy the Turtles, he also occasionally aids them. However, no matter what the circumstances, his motives always seem questionable and surreptitious. He would often escape before the turtles could capture him. Was once one of Shredder's Rogues. His final appearance was in Wrath of the Rat King, where he is given Krang's mutagen to mutate his rats. The episode ends with him being finally captured by the turtles. The Rat King was voiced by Townsend Coleman. He was first seen in season three in the episode called Enter the Rat King.
  • Leatherhead: A mutated anthropomorphic Alligator with a Cajun accent. In some plots, he is the main adversary of the Punk Frogs. In season 4, he joined forces with The Rat King. Leatherhead is known for his many catchphrases at the end of his sentences, which include; “by gumbo”, “I guarantee” and “you betcha”. Was once one of Shredder's Rogues. Leatherhead was voiced by Jim Cummings in most appearances but was later filled in by Cam Clarke in his last appearance. First appeared at the end of season three. He was last seen running away into the city after realizing he wasn't getting paid due to the turtles foiling Shredder, and Krang's plan.
  • Slash, the Evil Turtle from Dimension X: Bebop's pet turtle, whom Bebop and Rocksteady mutate into an anthropomorphic with the intention of having him be their subordinate and do their work for them. The bad guys send him after the Turtles, but it turns out that Slash is even dumber than Bebop and Rocksteady. He returns in a later episode with a vastly enhanced intellect, but it doesn't last. Was once one of Shredder's Rogues. Slash was voiced by Pat Fraley. First seen in season four in the episode called Slash the Evil Turtle from Dimension X. He was last seen running away into the city after realizing he wasn't getting paid due to the turtles foiling Shredder, and Krang's plan.
  • Tempestra: A powerful sorceress who was imprisoned in a video game before Leonardo released her due to the games addictive gameplay. She planned to use her weather powers to take over the world after she sucked the power out of the nuclear generators. Once one of Shredder's Rogues. Voiced by Tress MacNeille. Seen in the episode called Leonaro VS. Tempestra. She was last seen running away into the city after realizing he wasn't getting paid due to the turtles foiling Shredder, and Krang's plan.
  • Chrome Dome: A huge robot built by the Shredder to supervise the Foot Soldiers. He has many built-in weapons such as blasters, cannons, missiles, etc. He was destroyed by the Turtles by disabling a main chip on his back. He returned in another episode with several other villains as one of Shredder's Rogues only to be crushed by the turtles ally Casey Jones. Voiced by Peter Renaday. First appeared in Planet of the turtleoids.
  • Scumbug: A mutant cockroach from dimension x. Was recruited by Shredder himself as one of his Rogues. Voiced by Pat Fraley. He was one of the few villains from the Archie Comics series Teenage Mutant Ninja Turtles Adventures to appear in the cartoon. His only appearance was Night of the Rogues. He was last seen running away into the city after realizing he wasn't getting paid due to the turtles foiling Shredder, and Krang's plan.
  • Anthrax: Krang's royal executioner. Was recruited as by shredder him self as one of his Rogues. Voiced by Pat Fraley. He was last seen running away into the city after realizing he wasn't getting paid due to the turtles foiling Shredder, and Krang's plan.
  • Dr. Baxter Stockman/Baxter the Fly: A Caucasian (as opposed to African-American in the Mirage comics) mad scientist who aided Shredder in the first and second seasons before he was changed into an anthropomorphic fly in a disintegrator malfunction. He always blamed and resented Shredder for the accident, and most of his subsequent appearances involved his ambitions for revenge, or transformation back to his human self. He spent large portions of the series trapped in a rift between Dimension X, Earth with only his computer, "Z", as a companion. Baxter Stockman is also a character that appears in most other incarnations of the Teenage Mutant Ninja Turtles, but this is the only one of two where he is turned into a fly. In his final appearance, he ends up trapped in a dimensional limbo for eternity. He was voiced by Pat Fraley. First seen in the episode called A Thing about Rats in season one.
  • H.A.V.O.C. (Highly Advanced Variety Of Creatures): The Turtles meet H.A.V.O.C. in the process of thwarting a robbery, meeting mutants and H.A.V.O.C. members Raptor, Amok, and Overdrive, and then later, the H.A.V.O.C. leader, Titanus. The Turtles find out that while H.A.V.O.C. has offered the Turtles a safe haven from those who think they are the villains, H.A.V.O.C. is actually creating mutants instead of protecting them, and actually tries to turn the entire city into mutants. The Turtles spend a few episodes of season 8 battling H.A.V.O.C.
    • Titanus: A large mutant from the future who is the leader of H.A.V.O.C. In his final appearance, he ends up trapped in the time of dinosaurs, and vows to have revenge against the Turtles if it's the last thing he ever does.
    • Raptor: A mutant bird.
    • Amok: A mutant goat.
    • Overdrive: A mutant cheetah. Voiced by Cam Clarke.
    • Synapse: A convict that desired revenge against the turtles. In H.A.V.O.C. in the Streets, Titanus breaks him out of jail and turns him into an electric mutant. Synapse keeps the Turtles busy for a while until Donatello forces him through a ham radio, leaving him trapped on the radio airwaves forever.
    • Highbeam: A mutant firefly.
    • Magma: A lava mutant.
    • Seizure: A mutant centipede.
  • Pinky McFingers: A run-of-the-mill gangster who tried to use an invention of Barney Stockman's to paralyze the town with laughter in his first appearance. First appeared in season 4 episode Raphael Knocks 'Em Dead. Voiced by Peter Renaday.
  • Big Louie: A crime boss who leads a mafia. Sometimes, he works with the Shredder.
  • Don Turtelli: A local crime boss, and a spoof on the Godfather. He has a memorable form of interrogation; he uses feathers to tickle the feet of his hostages (including April, Vernon, Zach and Caitlyn); to extract information, interrogate, etc. Two known members of his gang are Rodney and Bruce. Voiced by Peter Renaday.
  • Groundchuck and Dirtbag: A mutant bull, and mole. Once animals at a zoo before being accidentally mutated by Bebop and Rocksteady and betrayed them later. They were later stopped by the turtles, and taken to a planet run by turtles. They barked lose, and joined a robotic bird called Herman. They were once again taken down by the turtles despite some enhancements, and imprisoned. Groundchuck was voiced by Bob Ridgely, and Dirtbag by Pat Fraley. They later broke out of Shell-Ri-La prison and joined forces with a space pirate captain dread, only to be beaten, and imprisoned again.

Minor Villains

  • Barney Stockman: Baxter's twin brother. He built a machine that enhances the humor of jokes and renders everyone who hears them helpless with hysterical laughter. He hates to be mistaken for his more infamous brother. Barney Stockman is voiced by Pat Fraley. Only seen in season four in the episode called Raphael Knocks Em Dead.
  • Crooked Ninja Turtle Gang: A karate gang taken over by the Shredder, who ordered them to change their name to the Crooked Ninja Turtle Gang, dress up like turtles and commit robberies so that the people of the city would come out against the TMNT. In Hero Turtle (European) airings of the episode they were in, their name was shortened to the Crooked Turtle Gang. They only appeared in season two in the episode called "Return of the Shredder."
    • Smash: The leader of the Crooked Ninja Turtle Gang. Voiced by Peter Cullen.
  • Fenton Q. Hackenbush: Fat man who worked for Donald J. Lofty. He tried to rip off the city by getting rid of the sewer system and in turn get rid of the TMNT. When the Turtles told Lofty of this scheme, Lofty fired Hackenbush.
  • The Triceraton Empire: The Triceratons are Triceratops-like creatures from another planet. They had planned to take over the Earth. Only in one episode called Night of the Dark Turtle.
  • Berzerko a.k.a Drakus: In the season 8 episode Get Shredder! it is revealed that he helped Krang to design and build the Technodrome. But he was betrayed by Krang so he came to earth and took on a new name, Berserko. He wanted revenge on Krang for destroying his home planet and nearly killing him. He built a tank called the Annilhilator and began a rampage on the city. Fortunately the turtles managed to stop him and turned him in to the authorities. Berserko/Drakus was voiced by Jim Cummings.
  • Eric the Red-Eyed: A man who led a gang of "modern vikings" in Norway who tried to melt the polar ice and flood coastal cities. This happened in the episode Northern Lights Out.
  • Hiram Grelch: A businessman who tried to take over all the TV stations in New York City, but was defeated by Donatello and Algernon at the Channel 6 building.
  • J. Gordon Hungerdunger: A millionaire from Texas who tried to put chemicals into New York City's water system and brainwash the population so he could easily take over the city.
  • Kojima Brothers: Ancient warriors from Edo period Japan. Shredder stole their diary in Tokyo, Japan and created solid holograms of them to destroy the Turtles. Donatello smashed the hologram projector with his bo staff, destroying the holograms. Voiced by Peter Renaday.
  • Oroku Miyoko: The Shredder's mother. Helped Shredder and Krang to send out some kind of mirror orbiting in Dimension X and burn the Earth in heat. Voiced by Jennifer Darling. First seen in the episode called Shredder's Mom in season four.
  • Spats Sparkle: One of two Dutch thieves who tried to steal the Duchess Diamond in Amsterdam in the Netherlands and sell it. This happened in the Vacation in Europe episode April Gets in Dutch, and Shredder also tried to steal the diamond, so Krang could use it to open a portal to Dimension X and send the Technodrome to Earth.
  • Turtle Terminator: An android who posed as Irma to try and blast the TMNT to smithereens. If anyone said "Turtle", it would attack. Voiced by Jennifer Darling (in Irma's voice).First seen in the episode called Turtle Terminator but was fixed by Donatello and used against the Shredder, Krang, Bebop, and Rocksteady.
  • Wingnut and Screwloose: In the Archie comic book series their home planet was destroyed by Krang, but in the cartoon they are two aliens who brainwash Earth's children in attempt to take over the world! Wingnut is voiced by Rob Paulsen and Screwloose is voiced by Townsend Coleman.
  • Winston Fripp/Chronos: A villain in the season nine episode "Split Second". Found by the Turtles to be committing crimes within the city under the name Chronos and challenges them to stop two other crime plans of his. Once they do so, he is revealed to be Winston Flipp, someone who the Turtles apprehended and tied up for the police in a clocktower, in which the ticking drives him insane. When the Turtles capture him once more, Lord Dregg takes advantage of it by pretending to be the man behind Chronos' capture to continue his propaganda campaign against the Turtles. Voiced by Maurice LaMarche.
  • Mr. X: A crime boss who has teenage punks do his work for him. He found Mondo Gecko and raised him to be a criminal. Michelangelo helps Mondo Gecko become a good guy and turn against Mr. X.
    • Basher & Sluggo: Two of Mr. X's henchmen.
  • Dr. Polidorius: A mad scientist who wants to turn New York into aquatic mutants and then conquer it.
    • Ray: An aquatic mutant created by Dr. Polidorius.
  • Professor Philo Sopho A mad scientist posing as a college professor who attempted to rotate the Earth fast enough to render it barren of life in his first appearance. In his second and final appearance, he tried to raise the Earth's temperature to uninhabitable levels.
  • O.M.N.S.S. (Omnipotent Multiprocessing Nexus Sub-Universal Sentience): A sentient computer created by Shredder and Baxter Stockman after they found the second fragment of the Eye of Sarnath.
  • Tony "The Butcher" Vivaldi: A crime boss that Shredder hired to get rid of the Turtles and steal a hamster sculpture known as the Maltese Hamster, which contained a formula for a fuel source that Krang planned to use to power up the Technodrome.
  • Mutagen Monster: A mutant created from bulls. Was eventually de-mutated.
  • Mr. Ogg: A trickster supposedly from Dimension Z who has the power to alter reality.
  • Captain Kroolik: An alien ringmaster who runs a circus of mutants. He was hired by Krang to capture the turtles.
    • Grillox: A mutant with the personality of a dog that assists Captain Kroolik.
  • Professor Lloyd Cycloid: A mad scientist obsessed with revenge against those who ridiculed him who uses an invention of Donatello's to freeze time and steal elements needed to build a helmet to shield his mind from his Cycloid Satellite, a device intended to turn everyone on Earth into a moron.
  • G. Cleff: A crazed pianist who wants to get back at those who ridiculed his music by forcing everyone in New York to hear it by means of a large stereo system.
  • Talbot Breech: A short man who shrinks boats and adds them to his collection of bottled ships.
    • Claude: Breech's cat
  • Electrozapper: An enemy of Bugman who has power over electricity.
  • Dr. Lesseau: A crazy zoologist who has an army of animal robots and mutant animal hybrids.
  • Dr. Davens: A man who plotted to grow giant vegetables and sell them to market even when he was aware of the consequences it would have to the environment.
  • Badd Family: A family of hillbilly criminals who take photographs of their crime spree and are not too bright. They stole the Turtle Van and also stole a power generator just for the jewel that was on it. The Turtles succeed in capturing them and handing them over to the police. The father of the family is implied to either be in jail or executed.
    • Bedelia Badd: The matriarch of the Badd family.
    • Buford and Bubba Badd: Bedelia's sons.
  • Jerry Spiegel/The Swatter: Writer of the Bugman comic book until it was cancelled to avoid a lawsuit from the real Bugman. Assumed the identity of The Swatter to plague New York and interrogate the Turtles for a Teenage Mutant Ninja Turtles comic book. He is sent to jail, and it is revealed that he made comic books about heroes in real life because he was not familiar with the concept of an original idea.
  • Wally Airhead: A bodybuilder who became muscular by exposing himself to a ray of an element called Strongium-90. He created his own army of super strong criminals, but was defeated by the Turtles and Casey Jones.
  • Professor Wilhelm Vanilli: A botanist who discovered a new species of lily, but went berserk when they refused to name it after him, claiming that the name "Willy Vanilli Lily" would be, er, silly. He attempted to have his revenge by using a volcano to spread a plant-killing chemical around the world, but was stopped by Raphael, who pretended to be a crime-fighter called the Green Defender due to mistakenly believing he was dying.
  • Mad Dog McMutt: A gangster with a face like a bulldog's. His hideout is shaped like a fire hydrant and he likes to eat dog biscuits.
  • Professor Mindbender: A scientist who attempted to take over the world by creating LEX.
    • LEX: A law-enforcing robot who is a little too strict. The Turtles defeated him with help from REX-1.
  • Sir Percival Pifflecoot" An archaeologist specializing in Ancient Egyptian artifacts obsessed with obtaining great power using the alignment of a comet and a jewel called the Turtle's Eye.
    • Casbah Sir Percival's assistant. He covered up the theft of the Turtle's Eye by pretending to be Osiris, Egyptian god of death, and claiming that those who dare try to find the Turtle's Eye are cursed.
  • Destructor X: A robot bounty hunter who once mistook Kerma the Turtleoid for a wanted criminal.
  • Shreeka: Krang's former-partner-in-crime. She was after Krang because he had stolen her ring of power. She manages to reclaim it, only for it to be destroyed. Krang frequently refers to Shreeka with terms of affection, implying that the two may have been lovers(though he may have been buttering her up).
  • The Globfather: An alien crime-boss who worked under Lord Dregg.
  • Creepy Eddie: A parody of Freddy Kreuger. He attempted to trap Leonardo and Michelangelo in Nightmare Land and cross over to the real world, but was defeated when Donatello sent him back to Nightmare Land with an explosive.
  • Mugsy McGuffin: A gangster who was recently released from prison. Before he was arrested, he hid a gem called the Galoobi Ruby, which was the McGuffin of the episode he was in. He ends up arrested again and his Galoobi Ruby is destroyed. His pet parrot was adopted by Michelangelo.
  • Max & Iggy: A pair of criminals who stole April's news van and robbed a bank. Raphael hindered the mission of capturing them due to being too nice after accidental exposure to Donatello's personality alterer, but the Turtles managed to capture them at a drive-in movie.
  • Rudolph Cobrato: A herpetologist who was mutated into a snake after a mishap during an experiment with snake venom. After recruiting normal snakes to amass an army, he is defeated and returned to normal form.
  • Skarg & Dementor: A pair of convicts in Dimension X who manage to escape from jail through an interdimensional anomaly. They are eventually defeated and sent back to the jail in Dimension X.
  • The Dregma Brothers: A pair of brothers in the Dimension X jail that Skarg and Dementor break out. They too are sent back to the jail in the end.
  • Drako: An alien who wanted to take Quarx's powers to use for his own evil plans. After Quarx was convinced to grow up, he used his powers to teleport Drako to a prison planet.
  • Oroko Sancho: The Shredder's ancestor.
  • A. J. Howard: A billionaire who persuaded everyone in New York with an anti-mutant propaganda and hired Dirk Savage to capture all mutants. He was later revealed to have been mutated into a slug in an accident and that he planned to turn the entire city into mutant slaves by hypnotizing the mutants Dirk Savage captured and then hypnotizing the rest of New York and mutating them when he had gained control.
  • Horatio Stressbar: Owner of a theme park called Combat Land, which was really a cover for creating an army of exploding robots and using them to scam the city into paying him for repairing collateral damage he caused using the robots.
  • Denton Nulcet: A scientist who created Stressbar's Combat Land robots who also captured Leonardo and Michelangelo and made robotic duplicates of them.
  • Krangazoids: Six clones of Krang that he created after being fed up with the incompetence of Shredder, Bebop, and Rocksteady. The clones continued to grow bodies and turned on Krang until he banished them to a dimensional limbo.
  • Alex Winter/MegaVolt: A member of Dark Water who was submitted to an experiment to create a super-soldier, only to become a deformed powerhouse who projects powerful energy. Voiced by Tony Jay.
  • Medusa: A huntress hired by Lord Dregg.
  • Jet McCabe: Carter's rival. He was a former classmate at Carter's martial arts school who was kicked out for cheating. He ended up in the Pan Galactic Tournament.
  • Sleazebug: One of Dregg's minions. He sent Leonardo and Michelangelo to the Pan Galactic Tournament and was used by Dregg as a test subject for the mutagen needed to make the Techno Gang stronger.
  • Doomquest: An alien warlord who has a rivalry with Lord Dregg.
  • Draconus: Doomquest's minion.
  • Mole Squad: A group of mole men who plot to take over New York. They tried to do so by using Dr. O'Toole's sonic disintegrator, only to have it taken from them by the Turtles when they needed it to un-hypnotize the Neutrinos.
  • Tattoo: A hamster from a pet store who was mutated into the form of a human tattooed sumo wrestler. After a fight with the Turtles, he was electrocuted and returned to normal form, then returned to his cage.
  • Herman the Horrible: A two-headed dragon that terrorized the Turtleoids. He was revealed to be a robot.
    • Bork & Dwark: Two Turtleoid leaders that controlled Herman the Horrible. They had gone renegade because they wanted to use the gold as more than just a source of energy.

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