Characters: Teenage Mutant Ninja Turtles (2003)

Characters created for, and exclusive to, the 2003 4Kids-produced TMNT cartoon. For tropes relating to characters who originally appeared in other incarnations or were created here and went on to appear elsewhere, please visit the franchise character page. Note: All the characters here are canon foreigners, so noting that for every individual character is unnecessary.

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    The Foot Clan 

Dr. Chaplin

A young scientist who becomes the head of the Foot's science department in season 3.
  • Amazon Chaser: A look at his Amazon Blade Bots makes it clear that a large part of his crush on Karai rests on her ability to kick ass.
  • Improbable Age: Although the art style makes it somewhat hard to determine just how old he is, the various comments made about it suggest that he is either a teen or barely in his twenties when he first debuts, which makes him a rather young for a doctor and way too young for a department head.
  • Punch Clock Villain


A highly skilled Foot Ninja who tries to bring the Clan back to its former glory in season 7, and who becomes Cyber Shredder's agent in the real world.
  • Animal Motif: The dragon—fitting, since he's also The Dragon
  • Convenient Replacement Character: Essentially only introduced in Back to the Sewers to replace Karai as the acting leader of the Foot, since it's heavily implied that she left with Chaplin after the season 5 finale
  • The Dragon
  • Evil Mentor: He is first seen running a martial arts school, whose students include Casey.
  • Flat Character: He doesn't serve much purpose besides being the Shredder's right-hand man.

     Superheroes and supervillains 

Silver Sentry

One of Michelangelo's superhero idols and the leader of the modern-day Justice Force.


A hydrokinetic super-hero from Japan who joins the Justice Force in season 3.


An psychokinetic super-hero from India who joins the Justice Force in season 3.


A sentient nanomachine colony who escapes its creators and causes trouble.

Green Mantle

Green Lantern if Green Lantern got his powers from a cape.

Turtle Titan II

A man who takes on Michelangelo's old super-heroic identity.

Dr. Malignus

Silver Sentry's arch-enemy, who uses his engineering prowess to commit super-crime.

    The Battle Nexus 

The Ultimate Ninja

A warrior who comes to Earth to challenge Leo to mortal combat.

The Daimyo

Ruler of the Battle Nexus and The Ultimate Ninja's father.


A Battle Nexus Championship contestant who was defeated by Splinter years ago.


A Battle Nexus Championship contestant with an animus towards Michelangelo.
  • Ambiguously Evil: While he eventually tries to kill Michelangelo for purely selfish reasons, he also formed part of Traximus' rebel army, which makes it rather hard to get a sense of him.
  • Sdrawkcab Name: The character is meant to be a homage to The Hulk.
  • Sore Loser: Although he has a point about only losing on a technicality, it eventually becomes clear that he doesn't really give a damn about the Battle Nexus Championship or its rules.
  • Super Mode: Inverted, more or less, as he spends way more time in his hulked-out form than he does in his smaller state.

    The Ninja Tribunal Arc 

The Ancient One

Hamato Yoshi's adoptive parent and, for a time, Leonardo's sensei.
  • Acrofatic
  • Back for the Finale: He's one of the guests at Casey and April's wedding and takes part in the ensuing battle against the Cyber Shredder.
  • Big Good: Shares the role with Splinter in the fifth season after the apparent deaths of the Tribunal.
  • Gass Hole: Early on, he teaches Leo a lesson on how he can't win all his battles by getting him pit against some near invincible warriors. How did the Ancient One put through Leonardo through this lesson? By farting and alerting said warriors to their presence.
  • My Greatest Failure: He blames himself for not doing anything about the darkness in Mashimi's heart before his murder of Tang Shen.
  • Obfuscating Stupidity: Once Leonardo learns of his true nature, he drops the crazy mentor facade, though he remains fairly whimsical until the fifth season.
  • Old Master
  • Reasonable Authority Figure: Leonardo and Michelangelo even wish they could be studying under him over the rough Tribunal.
  • Trickster Mentor: At first.

The Ninja Tribunal

A quartet of long-lived ninja masters who have made it their lives mission to stop the Demon Shredder. Their names are Kon, Juto, Chikara, and Hisomi.

The Acolytes

Four martial artists who were kidnapped along with the turtles to serve as the Ninja Tribunal's apprentices. Their names are Faraji Ngala, Joi Reynard, Adam McKay, and Tora Yoshida

The Shredder's Heralds / Foot Mystics

The Demon's Shredders, who had been forced to serve the Utrom Shredder until they engineered their freedom.

  • Ascended Extra: They were one-off villains for the penultimate arc of the first season, and voiceless. They return early in the fourth season, and nearly mentally break the Turtles, discover the location of their lair, and facilitate a plot that leads to the return of the Tengu Shredder, becoming the BigBad's for the first half of the fifth season before returning to their role as his Dragons.
  • Big Bad: For the first half of the fifth season.
  • Because You Were Nice to Me: A non-romantic example; though they deem Ch'Rell an "Utrom abomination", they appreciated his large amount of respect for their powers when they served him, in comparison to his daughter.
  • Elemental Powers
  • The Dragons: For the demon Shredder
  • Revenge Before Reason: Despite their loyalty to the demon Shredder, they are obsessed with getting revenge on Karai. They question him why he isn't concern to punish Karai for using his name, he tells them he's cares more about ruling the world. Though they don't wish to deter their master with his plans, this does not sit well with them. They also fume over the Shredder's lack of action when the Turtles and their allies attack their fortress.
  • Voluntary Shapeshifting
  • You Have Outlived Your Usefulness: Demon Shredder let them get killed.

    Fast Foward 

Cody Jones

Casey and April's great-grandson and heir to both O'Neil Tech and the Jones fortune.


Cody's robotic caretaker, who only barely tolerates the turtles.

Darius Dun

Cody's uncle and legal guardian, he uses his position as the C.E.O. of O'Neil Tech to facilitate various shady dealings.


An alien invader who has determined that Earth is the ideal planet for him to spread his gene-seed.
  • Arc Villain
  • Back for the Finale: After his own Time Window goes haywire, he disappears until the penultimate (though for all effects the final) episode of Fast Forward.
  • Big Bad Ensemble: With Darius Dun.
    • Big Bad Duumvirate: He later forms one with Darius Dun for the first half of Fast Forward.
  • Expy: He shows more than a few similarities to Lord Dregg.
  • Karma Houdini: He tricked Torbin Zixx into smuggling a bomb onto a spacecraft and while Zixx did rat him out to the turtles, who in turn reported it to Bishop, Sh'Okanabo never got in trouble for almost hurting many innocent beings.
  • Knight of Cerebus: Episodes that feature him as the main antagonist are far more series with larger ramifications.
  • Killed Off for Real
  • Light Is Good/Dark Is Evil: He looks dark and works in the shadows, is never seen walking around in daylight, if weak enough, sunlight can hurt him and he was killed by a solar grenade.
  • Spikes of Villainy
  • The Virus: Anyone infected with his gene seeds becomes a Kanabo drone subservient to him.
  • Voluntary Shapeshifting

Constable Aloysius Biggles

A robot who serves as an officer of the New New York Peacekeepers and who keeps running into the turtles.
  • British Copper: In intent if not in reality.
  • Butt Monkey: To the point that the main gag of a preview of an episode revolved around his really long fall from a skyscraper, and Michelangelo finally admits at the end of the promo that someone should probably save him. Funnily enough, in the episode proper this is not played for laughs.
  • Catchphrase: “'Allo 'Allo 'Allo. Wot's all this then?”
  • Inspector Javert: Occasionally, most notably in “Playtime's Over”
  • Ridiculously Human Robot: Despite being presumably programmed for the job, he rather dislikes the paperwork it involves.


An A.I. who serves under Sh'Okanabo.

Starlee Hambrath

An O'Neil Tech intern and friend of Cody Jones.


A cyborg who runs the Street Phantoms, a New York gang.

The Inuwashi Gunjin

A quartet of winged humanoids who serve as Darius Dun's reluctant enforcers.

The Dark Turtles

Created by Sh'Okanabo from the turtles' genetic material, these four mutant turtles serve Darius Dun. They are all voiced by the same actors for the original turtles.

  • Color-Coded Characters: The color of each turtles' skin more or less corresponds to their counterparts' bandanna colors.
  • Dark Is Evil
    • Dark Is Not Evil: They have the capacity to be better if they were given the chance.
  • Dumb Muscle: Dark Raph
  • Evil Twins
  • Forced Into Evil: While it doesn't occur in the same way as with their predecessors the Gunjin, the episode “D.N.A. is Thicker Than Water” implies that they have the capacity to be better turtles if it weren't for the fact that they are forced to work for Dun.
  • Geek Physiques: Dark Don is the tallest and skinniest of the quartet.
  • I'm a Humanitarian:
    Dark Raph: Let's crack your shell open and see if there's a yummy cream filling inside!
  • Oddball Doppelgangers
  • Off with His Head!: In their first 2 appearances, Dark Leo threatened to cut off someone's head.
    Dark Leo: *holding his sword next to Cody's neck* No sudden moves, or your friend here loses his head.

    Leonardo: How long have you been working for Dun?
    Dark Leo: Details, details, you should be paying attention to more immediate matters, like keeping your head on!
  • Psycho Rangers
  • Reptiles Are Abhorrent

Torbin Zixx

A famed mercenary who has several run-ins with the turtles.
  • Advertised Extra: He appears in the opening titles, despite his sporadic appearances in the series.
  • Combat Pragmatist
  • Con Man
  • Even Evil Has Standards: Deliver/smuggle an illegal package for an alien? Sure. Said package turns out to be a bomb that could've potentially hurt many innocent humans and aliens? Yeah, big mistake.
  • Heroic Sacrifice: Volunteers to make one in the final episode of Fast Forward to save Earth from a dark matter asteroid. It's actually his ship, which he escaped to with a device that had been jury-rigged to destroy the asteroid.
  • Wild Card / Chaotic Neutral

Triple Threat

A pro-wrestler turned criminal who sports three heads, each with its own personality.



A government agent who will do absolutely anything to protect Earth from aliens invasion. Head of the Earth Protection Force.