- Demoted to Extra: Well he was always pretty much an extra, really.
- Expy: Of Bruce Willis' character John Mcclane in Die Hard as well as Tom Cruise's Jack Reacher.
- Mr. Fanservice: A handsome action hero with an intentional five o'clock shadow, biceps and one who wears wife beaters? Yep, that's a definite qualification.
An alien prince from Yugopotamia and a former enemy of Timmy's. Now he's hiding out on Earth with Timmy's help to escape marrying Mandie. Voiced by Rob Paulsen.
- Abhorrent Admirer: To Vicky when he's not a dreamy teen.
- AcCENT upon the Wrong SylLABle: Mark is a frequent offender, one example claiming that his "APP-endix" would burst.
- Aerith and Bob: He and his same aged Yugopotamian friends have common Earth names, but his parents? King Grippulon and Queen Jipjorullac.
- Affably Evil: During his time as an antagonist, he generally came off as friendly and easygoing. After his HeelFace Turn, he became a full-blown Nice Guy.
- Alien Among Us: Initially he flees to Earth to escape an Arranged Marriage. He grows to like it enough that, even after the Story Arc is resolved, he doesn't go back.
- Aliens Speaking English: Mark talks with Earth Surfer Dude slang.
- All Girls Want Bad Boys: Gender Inverted. Mark falls head-over-heels in love with Vicky because of what a horrible person she is.
- Allergic to Love: Human love harms him, though he seems to have built up an immunity by "Wishology".
- Bad is Good and Good is Bad: Everything that humans find pleasant disgusts Yugopotamians and vice-versa. For them, instruments of death are toys, manure is a delicacy, and things that are cutesy and sugary are almost-literally poisonous.
- Big Eater: Garbage is his favorite food.
- Bizarre Alien Biology:
- Yugopatamians as a whole's biology reacts almost opposite to a humans. Whats healthy to a human reacts like junk food to Mark. Candy will kill him and affection literally hurts.
- Also his appendix is a thermo-nuclear bomb that will go off if he doesn't celebrate a certain holiday.
- Brain in a Jar: Well, brain in a dome, anyway. It's still on his head at least.
- Characterization Marches On: He was an antagonist of Timmy in early episodes, but eventually becomes one of his closest friends.
- Chick Magnet: In his human form, girls love him.
- Depending on the Writer: Some episodes depict him as hating healthy food, while others have him treat food like broccoli and brussels sprouts as, well, treats.
- Easily Forgiven: After HeelFace Turn, he is forgiven despite the fact that Mark has threatened to slurp out Timmy's brain through a bendy straw, kidnapped his babysitter (he liked that), tried to kill him in death combat, and launched a weapon that he thought would destroy the Earth.
- Fire-Forged Friends: At first, he and Timmy are enemies. But after Mark moves to Earth to hide from his homicidal fiancee, Princess Mandie, he ends up becoming one of Timmy's closest friends.
- Good Is Dumb: Seriously, compare the episodes where he's evil to the episodes where he's good. Notice any difference?
- HeelFace Turn: Mark Chang goes from Timmy's enemy to a good friend.
- In Love with Your Carnage: Mark falls for Vicky because of the terror she instills in Timmy, Chester, and AJ.
- Interspecies Friendship: Between him (an alien) and Timmy (a human).
- Interspecies Romance: He's an alien with a HUGE crush on Vicky.
- Large Ham: His lines are almost always said both in Purple Prose and with No Indoor Voice.
- Moment Killer: In "Wishology" Part III wher he interrupt an attempted kiss between Timmy and Trixie.
- Nice Guy: After his HeelFace Turn, he's shown to be pretty polite, even if some aspects of his old villainy still linger.
- Non-Human Sidekick: Especially in "Wishology".
- Not Now, Kiddo: In "Super Poof".
- Red Eyes, Take Warning: Subverted. In his human form, his eyes are naturally red, but he's actually a fairly Nice Guy.
- Runaway Groom: Mark was forced into a Arranged Marriage with Princess Mandie so the Yugopotamians and the Boudacians could forge a military alliance. Mark, however, was repulsed by Mandie's appearance, and fled to Earth, where he begged Timmy to let him hide there.
- Shapeshifter Baggage: With the Fakeifier.
- Stalker with a Crush: Is one for Vicki. When he kidnapped her, he knew exactly where her house was.
- Totally Radical: Talks like this.
- Two First Names: Three, actually. Mentioned whenever he takes his teenage form.Mark: I'm Justin Jake Ashton, hunky heartthrob with three first names.
- Unholy Matrimony: Seems to want this with Vicky, at least. Given how Yugopotamians are, the matrimony would be unholy regardless of whether he's good or evil.
- Vague Age: He mostly acts and sounds like a teenager and he has a crush on the 16-years old Vicky, but he also flirted with Trixie, who is around 10. Then again, he is an alien, so aging may work a bit differently with him.
- Vocal Evolution: In "Marked Man" (a Season 10's episode) Mark's voice sounds more deeper and a bit different than how it used to sound.
- Voluntary Shapeshifter: With the Fakeifier that use to remain disguised as a human boy.
- You Can't Go Home Again: For a while Mark Chang was unable to return to Yugopotamia, since it would force him into an Arranged Marriage with Princess Mandie.
Mark's parents and the rulers of Yugopotamia. Despite being the rulers, they seem totally useless during emergencies, like the Gigglepie invasion or their son's runaway. They are voiced by Rob Paulsen and Laraine Newman, respectively.
- Adults Are Useless: As all the adults on the show, even aliens.
- Aerith and Bob: Their names are exotic compared to their son's.
- Alien Among Us: Grippulon, in "King Chang".
- Aliens Speaking English: The Yugopotamians speak perfect English.
- Big Eater: Grippulon.
- Brain in a Jar: Like the rest of their race.
- Shapeshifter Baggage: Grippulon, in "King Chang".
- Voluntary Shapeshifter: Grippulon, in "King Chang".
Mark's two best friends from Yugopotamia. They accompanied Mark to Earth on occasion back when he was evil. Jeff (the tall one) is voiced by Carlos Alazraqui, Erik (the short one) by Butch Hartman. [Note: This entry applies to Yugopotamians in general as well.]
- Aerith and Bob: As noted above.
- Aliens Speaking English: The Yugopotamians speak perfect English.
- Brain in a Jar: Every Yugopotamian has their brain clearly visable in a glass dome on their heads.
- Brother Chuck: They disappeared after "Scary Godparents".
- Expy: They're similar to Chester and AJ. One of them also has braces.
Timmy's favorite comic book superhero. Timmy sometimes enters the book to fight evil alongside him as Cleft, the Boy Chin Wonder. Voiced by Tonight Show host Jay Leno. Daran Norris does his voice in the video games (Breakin' Da Rules and Shadow Showdown.
- Bad Butt: He is a superhero after all..
- The Cape: Is usually this.
- Crossover: In-universe, with Crash Nebula.
- Clark Kenting: So obviously he puts the Trope Namer to shame. To put it in perspective, he wears glasses and a hat on top of his cowl. Plus, he makes absolutely no attempt to hide his massive chin.
- Flying Brick: As per your usual Superman parody.
- Impossibly Cool Clothes: His vibrant red costume.
- Large Ham: They didn't hire Jay Leno to be subtle.
- Lantern Jaw of Justice: Practically personifies this trope. He has chin-based superpowers, and they even got his voice actor in on it!
- Medium Awareness: Thanks to Timmy, he becomes aware of his medium. At first, this causes him to have an existential crisis, but later he starts using it to his advantage, as do his enemies.
- Moral Dissonance: His treatment of Ron Hambone aka The Bronze Kneecap in "The Masked Magician" is noticeably cruel.
- Mr. Fanservice: A fair amount of emphasis is made to his Heroic Build and in particular, his butt.
- No Fourth Wall: He's well aware he's a comic book superhero.
- Red Is Heroic: His costume is all red. There's a reason he is named Crimson Chin.
- Retcon: A Nick Mag comic story revealed he had a similar origin to Superman that was changed after a lawsuit.
- Secret Identity: Charles Hampton Indigo.
- Shout-Out: Several.
- His basic premise/powers and secret identity are a reference to Superman.
- His origin (see below) is a reference to Spider-Man.
- The Chin Cave and Chin signal reference Batman
- The "super edgy, 1985" Crimson Chin is possibly a reference to Frank Miller's Batman: The Dark Knight Returns, which depicted Batman as a desperate, weapon-toting vigilante. It, along with Watchmen, ushered in The Dark Age of Comic Books.
- Show Within a Show: His comic.
- Steven Ulysses Perhero: Charles Hampton INdigo.
- Stock Superhero Day Jobs: Reporter.
- Super Hero Origin: Bitten on the chin by a radioactive celebrity.
- Super Strength: One of his powers.
- 10-Minute Retirement: After discovering that he's just a comic book character when he was wished into Timmy's world.
- Would Hit a Girl: Probably. He socks it to Spatula Woman off-screen in "Chin Up!".
The 30's Pulp Fiction Chin
The 40's WWII Sergeant Chin
The 50's Square Jawed Commie-Buster Chin
The 60's Psychedelic Chin
The 70's Disco Chin
The 80's Overly Muscular Weapon-Toating Chin
- Badass Bandolier
- Darker and Edgier
- '90s Anti-Hero: Despite being from the 80's.
- Sir Swears-a-Lot: Implied to be the cause of his comic's cancellation.
The 90's Grunge Chin
The New Millenium silver suited Crimson Chin
Timmy's other geeky obsession after the Crimson Chin, Crash Nebula is the star of Timmy's favorite TV show. He's an intergalactic hero that travels through space, thwarting evil. His adult self is voiced by Daran Norris, his child self, Sprig Speevack, is voiced by James Arnold Taylor.
- Alliterative Name: Sprig Speevack.
- Art Shift: Twice: His actual show, and the "Crash Nebula" episode are different styles.
- Big Damn Heroes: In "Spaced Out".
- Big "NO!": After the Jack O' Bots destroy a planet.
- Captain Space, Defender of Earth!
- Crossover: In-universe, with The Crimson Chin.
- Lantern Jaw of Justice: His adult self.
- Poorly Disguised Pilot: His episode was a pilot for a proposed Spin-Off, but plans never got off the ground.
- Shout-Out: When we first see Sprig, he's reading a Danny Phantom comic book.
- Show Within A Show Within a Show: Why stop at one iteration? Sprig loves his comic hero Brock Rocket.
- Superhero School: He went to one.
- Unfazed Everyman: His child self was the only human in an intergalactic school.
- This Loser Is You: Everyone in the intergalactic school treat him like a loser.
The saint of Christmas, Santa lives at the North Pole, distributing gifts to the good girls and boys on Christmas Eve. He is usually voiced by Kevin Michael Richardson.
- The Casanova: Hinted at in "Fairy Idol". See his quote.
- Hero with Bad Publicity: In "Christmas Every Day".
- Heroic Build: In "Fairy Idol", when Chester wishes that the North Pole was warmer for the penguins and made the ice melt, Santa throws off his clothes to reveal that he's ripped. Ho, ho, ho.
- Moral Dissonance: His treatment of his elves in "The Temp!"
- Negative Continuity: He's completely redesigned in every appearance.
- Easter Bunny: Thanks to your wish, we other holidays can never spread our joy to the children ever again.
The "second-rate" holidays who spread joy to the world. When Timmy wishes for Christmas to be everyday, they grow jealous of Santa and conspire to end the holiday once and for all. Cupid and the April Fool are among their ranks. The Easter Bunny is voiced by Bobby Costanazo, Baby New Year by Kevin Michael Richardson (?), and Halloweeniedog by Dee Bradley Baker (?).
- Anti-Villain: The holidays aren't bad guys or anything. They just want to stop Christmas from being every day and be able to celebrate their own holidays.
- Big Bad Ensemble: Of Christmas Every Day.
- Continuity Nod: Their entire point in "Abra-Catastrophe".
- And to give Timmy exactly what he needed to fight Crocker and keep his godparents.
- Dumb Muscle: Baby New Year.
- Early-Bird Cameo: Baby New Year in "The Zappy's".
- HeelFace Turn: At first, they're more than willing to destroy Santa to keep Christmas from happening. However, they eventually see the error of their ways and reconcile with Santa. They even volunteer to deliver presents the following year.
- Jerkass Has a Point: Even though they're a bit extreme for wanting to get rid of Santa and Christmas in its entirety in Christmas Every Day, their anger is understandable. With Christmas being every day, they don't get to spread their own kind of holiday spirit.
- Mooks: The Easter Bunny's role in Enter the Cleft!
- Right Hand Dog
- Wouldn't Hurt a Child: While they did threaten Timmy early on, they refused to attack when they were confronted by all the children of the world.
The one chosen by the Fairy Council to be the chosen one, but he showed up late to the Darkness' first attack. He is hoping to defeat the Darkness to avenge his parents' death. He is voiced by Brendan Fraser.