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[[folder:I.M. Weasel]]
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/vlcsnap_2018_06_14_16h26m35s577.png]]
->'''Voiced by:''' Creator/MichaelDorn (English), Masayuki Nakada (Japanese), Creator/BlasGarcia (Latin American Spanish, season 1), Creator/VictorHugoAguilar (Latin American Spanish, seasons 2-5), Denis Boileau (French)

The main protagonist, a heroic weasel, who is everything I. R. Baboon wishes, and possibly imagines, he was. Weasel is often seen volunteering to help those less fortunate than himself, or contributing great deals to society by erecting monuments and structures with beneficial results.
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* TheAce: He's famous, brilliant, multitalented, and loved by everyone.
* AlwaysSomeoneBetter: To Baboon, who is always trying to upstage him, unsuccessfully.
* BadassPacifist: Early on, he deals with enemies peacefully (he considers tripping a rampaging Baboon with his foot to be distasteful). [[CharacterizationMarchesOn Over time]], he becomes more willing to hurt people--though they usually have it coming.
* BrokenAce: Later episodes start to show some dents in Weasel, where he often shares the ButtMonkey role with Baboon.
* ButtMonkey: Weasel would develop his fair share of bad luck in later episodes (thus toning down his "Mr. Perfect" character).
* ChronicHeroSyndrome: Will go out of his way to do the right thing in any situation.
-->"One life lost diminishes my own."
* FateWorseThanDeath: [[spoiler:The Princess in the Cinderella parody. Marrying her was something Weasel considered to be the trope]].
* GentlemanAndAScholar: A polite and selfless genius, in contrast to Baboon's selfish InsufferableImbecile. While Baboon sees him as an InsufferableGenius, he is far from being one. In fact, he's typically very modest.
* HumbleHero: He tells people not to worship the ground he walks on for his benevolent acts to little effect.
* HypercompetentSidekick: Weasel plays this role in episodes like "Baboon Man and Weasel Boy" or "I.R. Robin Hood" where he is the assistent to Baboon's IdiotHero.
* IAmNotWeasel: The TropeNamer, sort of. Case in point: Red Guy mistook him for a squirrel.
* InvincibleHero: More in earlier seasons.
* LargeHam: Less so than the Red Guy, but it's still noticeable at times. A notable case of where he goes full-''on'' ham is in the episode, "I Am Franken-Weasel".
* LovedByAll: An extremely beloved public figure who goes out of his way to help everyone with his genius intelligence.
* NiceGuy: Calling him nice would be an understatement. He was [[EstablishingCharacterMoment first shown]] giving a dying boy a kidney transplant. He becomes slightly more egotistical and neurotic in later episodes, though considering how much his kindness often gets him, it's often justified.
* OnlySaneMan: Often the show's universe appears to almost be equally as brainless as Baboon, with Weasel usually playing the StraightMan.
* ParodySue: In early episodes, Weasel played TheAce rather genuinely, at rather unrealistic levels.
* RenaissanceMan: Art, cuisine, law, medicine, science, sports... name it, Weasel's a foremost expert on it.
* SurroundedByIdiots: As the seasons progress he becomes a more pretentious InsufferableGenius that suffers due to living in a world of fools.
* TrademarkFavoriteFood: Eggs. Doubles as TruthInTelevision, as weasels love eggs. It's also revealed in "I.R. in Wrong Cartoon" that he loves pie, as well.
* VocalDissonance: Short, shrimpy Weasel speaks with the dulcet, sophisticated tones of Michael Dorn.
* WholesomeCrossdresser: Every once in a while. When a couple asks for replacement kids in the episode "Leave It to Weasel", he's the daughter. He also portrays Cinderella in the parody episode, "The Fairy Godfather", and while this isn't present in the episode itself, he wears a dress in the title card for "Back to School".
* WickedWeasel: {{Inverted|Trope}}. Weasel is a [[ChronicHeroSyndrome courageous, selfless hero]] who is [[TheAce great at everything]], pretty much the exact opposite of that trope's cowardly, self-centered sociopath that often has to resort to trickery and deceit to accomplish anything. This characterization of near-perfection serves primarily to set him up as the comedic {{Foil}} to I.R. Baboon.
[[/folder]]

[[folder:I.R. Baboon]]
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/vlcsnap_2018_06_14_16h27m07s333_2.png]]
->'''Voiced by:''' Creator/CharlieAdler (English), Takashi Taguchi (Japanese, seasons 1 and 2), Creator/YuichiNagashima (Japanese, seasons 3 and 4), Creator/MarioFilio (Latin American Spanish), Michel Prud'homme (French)

The other main character of the series. Most times he is seen taking a back seat to Weasel's escapades, and feeling resentful and jealous towards him. But there are those rare occasions when the two act as the best of friends.
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* BareBottomedMonkey: His defining character trait aside from being an idiot is his big bright red behind.
* ButtMonkey: [[AccidentalPun No pun intended]]. Baboon tends to suffer, though it's mostly his own fault.
* ChaoticStupid: In the earlier seasons when he was the antagonist, many conflicts were the result of his idiotic and ludicrous actions.
* ADayInTheLimelight: He's the playable character of the Creator/CartoonNetwork game ''VideoGame/TheEnvelopesPlease''
* {{Deuteragonist}}: The main secondary focus.
* TheDitz: He's dim-witted and uses incorrect grammar when he speaks.
* DrivenByEnvy: Early on, Baboon (unsuccessfully) does anything he can to spite or outdo Weasel. This is [[DownplayedTrope toned down]] later, as he and Weasel become allies. Though I.R. will still try to supplant him if he has the chance (or thinks he does).
* DumbassHasAPoint: Once every so often, he manages to make a good point that even Weasel admits to.
* HalfDressedCartoonAnimal: After all, he doesn't [[ThemeTune need pants for the victory dance]].
* HappyDance: He used to have a victory dance before it got phased out. It was used regularly in the opening titles.
* HeelFaceRevolvingDoor: Sometimes he's Weasel's nemesis, sometimes they're allies. Starting with Season 3 he's more consistently portrayed as a {{vitriolic best bud|s}} to Weasel.
* HulkSpeak: We'll just illustrate with his first lines from the pilot episode, where he resolves to complete a half-done bridge on his own:
-->"But...bridge must finish! [[ItMakesSenseInContext We can't wait 78 year!]] (''gasp'') Wait. Minute. What if I.R. finish bridge I-self?! I.R. get all credit! GLORY TO I.R.!"
* HypocriticalHumor: He frequently points out that the Red Guy isn't wearing any pants, when he goes pantsless himself.
* IJustWantToBeSpecial: If not also trying to one-up Weasel.
* IfIWereARichMan: In the comic book story "X Marks the Baboon", I.R. Baboon finds a treasure map and imagines himself attending a fancy party and owning several diamonds [[ArsonMurderAndJaywalking and a rubber band collection]].
* InsufferableImbecile: He plays this as a {{foil}} to I.M. Weasel. Whereas Weasel is [[GentlemanAndAScholar scholarly, uber-competent, and selfless]], Baboon is a [[ItsAllAboutMe selfish]] underachiever who constantly tries upstaging Weasel, who, even knowing this, considers him a friend and even goes out of his way to save his bacon.
* JerkWithAHeartOfGold: He is sometimes friends with I.M. Weasel.
* JokeOfTheButt: His big red butt is milked intensely for humour.
* KindheartedSimpleton; Usually when he isn't antagonizing Weasel or isn' tDrivenByEnvy to surpass Weasel, he is very nice and friendly, but he is still prone to mess things up out of idiocy.
* KnowNothingKnowItAll: An even dumber version than usual for this trope, since he can't even use complete sentences, but is still absolutely convinced he knows everything, especially in early episodes. This of course invariably lead to disaster.
* ManiacMonkeys: Sometimes he's spiteful, stubborn and stupid enough to bring society crashing down or destroy the whole planet...
* MischiefMakingMonkey: ...other times he's just kind of a goofy troublemaker or even a borderline KindheartedSimpleton.
* NakedPeopleAreFunny: His big red butt.
* PsychopathicManchild: At his worst, he's prone to destructive tantrums and is childishly petty.
* RealityWarper: One episode depicts him being able to warp reality with his [[{{Pun}} monkey paws]]. He's not smart enough to use this ability more than once, however.
* TeamRocketWins: There are rare times he gets some recognition and even comes out on top over Weasel.
* TheResenter: The main drive of his character. He resents Weasel's fame and considers himself better, even though Weasel is a certified genius, whereas Baboon is... well, not.
* TheRival: To Weasel in the earlier seasons.
* SmallNameBigEgo: Baboon's brain is as small as his ego is large. He's convinced he's smarter and more capable than Weasel with ''nothing'' to back it up.
* StrawLoser: Baboon has very little going for him--he's clueless, irrational, spiteful, untalented ''and'' unlucky. Thus, Weasel typically comes out on top in their ComicallyLopsidedRivalry.
* ThirdPersonPerson: He refers to himself in third-person.
* TooDumbToLive: When he inevitably screws something up, Weasel has to bail him out.
* TrademarkFavoriteFood: Bananas. [[AnimalStereotypes He's a baboon, what did you expect?]]
* WickedStepmother: Well, wicked step''brother'', but neither him nor Cinder-Weasel had any parents in the ''Literature/{{Cinderella}}'' parody episode, "The Fairy Godfather".
[[/folder]]

[[folder:The Red Guy/I.B. Red Guy]]
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/vlcsnap_2018_06_14_16h22m43s871.png]]
[[caption-width-right:350:''"Hello, it's me..."'']]
->'''Voiced by:''' Creator/CharlieAdler (English), Creator/KatsumiSuzuki (Japanese), Ricardo Hill (Latin American Spanish), David Sánchez Guinot (European Spanish), Michel Mella (French)

The same character from ''WesternAnimation/CowAndChicken'' (only he goes by I.B. Red Guy or the many names that refer to his not wearing pants), who acts as an antagonist of the series whenever I. R. Baboon isn't fulfilling the role. For tropes relating to him on ''Cow and Chicken'', see [[Characters/CowAndChicken here]].
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* CreepyCrossdresser: In the "Robin Weasel" episode, where he takes Maid Marion's place, and both Weasel and Baboob are horrified to discover him imprisoned in the castle. And so is Scheriff Nottingham (played by Jolly Roger) who ''didn't'' kidnap her/him this time.
* TheDevilIsALoser: If he's not running some aimless fraudulent business, Red Guy will sometimes be the damsel in distress Weasel and Baboon need to protect.
* FlamingDevil: Red resembles the devil and can be pretty flamboyant.
* {{Jerkass}}: He can vary from this to JerkWithAHeartOfGold [[DependingOnTheWriter depending on the episode]].
* {{Joke of the Butt}}: Just as bum-focussed as he is in ''Cow and Chicken''.
* LargeHam: He's as loud and melodramatic as he was on ''Cow and Chicken''.
* LaughablyEvil: He is usually mischievous if not outright malicious and he also brings a lot of humor to the show.
* OtherworldlyAndSexuallyAmbiguous: In spades. Considering he's a [[NewJobAsThePlotDemands jack-of-all-trades]], he can pull any kind of role of either gender... and not only that, whenever he plays a female, he clearly has a bust. However, it is never made clear if it is real or fake.
* RoguesGalleryTransplant: After a season's worth of episodes of just antagonizing Cow and Chicken, he began to harass Weasel and Baboon. He actually explained in his first appearance in an ''I Am Weasel'' short that he was attempting to hide from Supercow where she'd hopefully not look -- in a ''Weasel'' cartoon. She beats him up anyway.
[[/folder]]

[[folder:Lullabelle]]
[[quoteright:210:https://static.tvtropes.org/pmwiki/pub/images/2675d6c035756a7563f0f7fea75aed63_0.jpg]]
->'''Voiced by:''' Susanne Blakeslee (English, season 2), Teresa Ganzel (English, "Time Weasel" only)

The Weasel's blonde and attractive nurse assistant. A minor character, she made most of her appearances in Season 2 and went out of focus afterwards. She is often speculated to be Weasel's girlfriend.
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* BigEater: Lullabelle is shown to have a voracious appetite in "I.R. Ice Fisher".
* ChuckCunninghamSyndrome: She disappeared after her appearances became sporadic in the third season.
* InterspeciesRomance: The show constantly implies this, but never goes beyond that.
* MayflyDecemberRomance: As is shown in "I Am My Lifetime", when Lullabelle still spends time with Weasel at the Retirement Home for Elderly Cartoon Heroes... after 4 years of knowing him since he was born, because that's about as long as weasels live. As such, he's in his old age, while she has barely aged at all.
* TheSmurfettePrinciple: The only recurring female character unique to the show.
[[/folder]]

[[folder:Admiral Bullets]]
->'''Voiced by:''' Creator/JessHarnell (English, season 1), Creator/MichaelJGough (English, seasons 2 and 3)

A Naval officer who occasionally asks Weasel for help.
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* AmbiguouslyBrown: He had darker skin in his final appearance for reasons unknown.
* ChuckCunninghamSyndrome: Like Lullabelle, he stopped making appearances on the show after the third season.
[[/folder]]

[[folder:Jolly Roger]]

A buffoonish man dressed as a sailor who filled in whatever roles were needed. Like Red Guy, he originally appeared on ''Cow And Chicken'', and ironically got more roles on this show than in that one.

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* AscendedExtra: Only appeared once on ''Cow And Chicken'', but got all the way to minor character status here.
* TheArtifact: His name, more or less. In his first appearance (in the ''Cow and Chicken'' episode "Pirate Lessons"), his name is a {{Pun}}; he's a jolly man named Roger that the Red Guy was using as his "jolly roger" (the flag for his pirate ship). His appearances in ''I Am Weasel'' don't take advantage of the pun.
* FatIdiot: Competes with Baboon for the role as the dumbest character on the show.
* NarratorAllAlong: In "My Blue Hiney"
* UnreliableNarrator: Turns out to be the narrator for the episode "My Blue Hiney", which portrayed Weasel and Baboon as a classic country music duo, only for Weasel to interupt him at the end to point out that the whole story was total nonsense.
[[/folder]]

[[folder:Teacher]]

Cow and Chicken's loud, obnoxious teacher. Like The Red Guy and Jolly Roger, she too made the leap from ''Cow and Chicken'' to ''I Am Weasel'' in its later episodes.
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* AscendedExtra: Not quite to the same extent as The Red Guy or Jolly Roger, but she appears more than once in ''I Am Weasel'' as her own character.
* ADayInTheLimelight: "I.M.N. Love" is her largest role in either of David Feiss' shows.
* GonkyFemme: More pronounced here than in ''Cow and Chicken'', since female characters on ''I Am Weasel'' tend to be quite attractive (see Lullabelle above).
* NoIndoorVoice: As usual with her.
* TheSmurfettePrinciple: More or less fills Lullabelle's niche as the only recurring female character.
[[/folder]]
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