Originally appearing as the "B" segment in the A-A-B Three Shorts format of David Feiss' Cow and Chicken, I Am Weasel became a self-contained Spin-Off in 1999 shortly before the main cartoon's run ended, running for 79 episodes from then until 2000. When both shows ended and were put in reruns, they became their own separate shows, including frequent character crossovers (some of the Cow and Chicken shorts were later repackaged with the standalone Weasel shorts).

The show centered around a polite, hypercompetent, socially savvy weasel named I.M. Weasel (Michael Dorn) as he attends to many people's needs. Weasel is incredibly accomplished in countless fields, including medicine, law, politics, music and science. Behind him is his best frenemy, the extremely dim-witted I.R. Baboon (Charlie Adler), who is envious of his talents and is constantly plotting to ruin him. Weasel is aware of this, but remains pals with Baboon anyway, possibly because he realizes Baboon is far too stupid to pose any threat. After the first season, the Red Guy from Cow and Chicken also joined the main cast.

The show was entirely animated by Rough Draft, South-Korea.

Consult the Cow and Chicken page for a recap of I.M. Weasel episodes.

This show provides examples of:

• 30 Minutes, or It's Free!: The ending of "Revolutionary Weasel" reveals that after losing the war, The King and Queen of England (The Red Guy) is now a pizza delivery man and has to smush pizza into his face every time he is late, even for one minute (since it will be on him by then). This is passed down to his descendants.
  Red Guy: I'll never forgive my ancestors for screwing up! Never!
• Abandon Ship: Happens in "Unsinkable I.R." when Baboon's ship is hit by an ice cube.
• AcCENT upon the Wrong SylLABle: For whatever reason, the Red Guy puts excessive stress on the second syllable of "nine", causing it to sound like "ni-yun".
• The Ace: I.M. Weasel, more notably in the early seasons, tends to be highly skilled and competent at whatever task he's entrusted with.
  • Broken Ace: Later episodes start to show some dents in Weasel, he often shares the Butt-Monkey role with Baboon, and gains a more neurotic and ego driven attitude as a result of being several times more intelligent (and usually far more considerate) than everyone else around him.
• All Cavemen Were Neanderthals: "I Am Cave Weasel" follows Neander-Weasel and Baboon-Baboonis living in the prehistoric times while Neander-Weasel tries to invent new products to create the future.
• All for Nothing: In "I Are Terraformer!", after their terraforming robot refuses to work, Weasel and Baboon spend four years building a space colony. The colonists turn out to be a colony of termites who instantly reduce the place to ruins by eating it. Weasel doesn't take it well.
• All Just a Dream: The events "I.R. Wild Baboon" and "Who Rubbed Out Cow and Chicken?" are shown to be dreams of Cow's.
• Always Introduces Themselves: As in Cow and Chicken, the Red Guy almost always introduces himself with a cheery, "Hello! It's me, [the name of the persona he's in this episode, usually a Joke of the Butt]."
• Amateur Therapist: In "He Said, He Said", the Red Guy serves as this for Weasel and Baboon—that, too, at the same time.
• Ancient Egypt: Featured in "Queen of Denile" where Weasel and Baboon are both asp exterminators, attempting to save Queen Cleopantless (The Red Guy) from this infestation.
• Animal Gender-Bender: I.R. Baboon being a male baboon with a red butt, something only female baboons have (the scientific term is sexual swelling).
• Animated Actors: "I Am Cliched", essentially a Take That! to old cartoon tropes.
• Anthropomorphic Food:
  • "My Friend, the Smart Banana" has Weasel befriending an intellectual banana with a Scottish accent.
  • "Dessert Island" features a tribe of Gingerbread men and wild animals such as a chocolate rabbit.
  • The dimension that Weasel and Baboon end up in "The Magnificent Motorbikini" is ruled by a group of hyperintelligent space hams.
• Anvil on Head: Mercilessly parodied in "I Am Cliched". Weasel and Baboon get hit by an anvil, a piano, five more anvils, an elephant, a whale, and a kitchen sink. It eventually becomes the running gag for this episode, where every scene ended with someone getting an anvil dropped on their head (and one safe).
• Apes in Space: "I.R. on Sun" has Baboon recruited in NASA and wants to be the first astronaut on a place, he eventually settles with the sun since Weasel hasn't been there yet.
• Aren't You Going to Ravish Me?: In "I Am Viking", The King and Queen of Nopantsland (The Red Guy) craves to be pillaged by vikings more than anything, which makes him an unappealing target. Weasel as a viking tries to teach him how to get himself pillaged, with not much success.
• Arson, Murder, and Jaywalking: In the comic book story "X Marks the Baboon", I.R. Baboon finds a treasure map and imagines himself living "a lifestyle of diamonds, high-class parties and rubber band collecting".
• Artistic License – Biology: In "The Incredible Shrinking Weasel", the gluteus maximus is portrayed as a bone. It is actually a muscle.
• Artistic License – Geology: In "The Hole", Baboon plugs up the titular hole, only for the planet to explode because it's a "ground-level volcano." Surprisingly, this is actually similar to how real-life supervolcanoes work, such as the one under Yellowstone National Park - there are no mountains formed by them, but instead a massive magma bubble builds up underground, and thanks to being "plugged up" much like what Baboon did, the pressure buildup leads to incredible amounts of damage when it does erupt.^note In fact, one that erupted 75,000 years ago at Toba in Indonesia nearly wiped out the human race. However, there is no "hole" for one to erupt out of, and while the eruption would be devastating, it would certainly not result in the Earth-Shattering Kaboom seen in the episode proper.
• Ascended Extra: Jolly Roger only appeared once in the Season 3 episode "Unsinkable I.R." before becoming a semi-recurring character in Season 5.
• Aside Glance: Weasel does this frequently when Baboon or the townspeople makes a stupid remark.
• Attractive Bent-Gender: A few of the Red Guy's disguises are this to Weasel, Baboon, or both.
• Back to School: in the episode of the same name, Weasel and Baboon have to return to third grade because of a typo. If they don't, Weasel won't be allowed to keep his Nobel Prizes, and Baboon won't be allowed to keep the banana he got as a consolation prize. Weasel's tendencies to overcomplicate third-grade questions make it hard for him, but eventually, they both pass. However, at the ceremony where Weasel is re-awarded his prizes, someone hurriedly points out another typo, revealing it was the fourth grade they haven't finished. The Red Guy, it turns out, is the mistake-maker to blame.
  The Red Guy: D-E, [pulls out paper from typewriter, examining it] third grade! [tosses the paper aside and places a new one in the typewriter] Or, was it second grade? Who cares? [laughs maniacally]
• Badge Gag: As Sigmund Fraud, the Red Guy has a licence from a mental ward proclaiming him to be a certified psycotic, misspelling questionably intentional. To practice as a therapist, he crosses out "otic" and writes "iatrist" above it, not even bothering to cover his tracks.
• Bad Santa: Santa Claus, along with Mrs. Claus and Rudolph the Red-Nosed Reindeer. appears at the end of "I.R.'s First Bike", where it's revealed that he intentionally switched Baboon's present with a little boy, causing Baboon to get a bike for Christmas while the little boy got a banana instead, which makes the boy cry. Baboon however, can't ride a bike and fails several times trying to, meaning that Santa wanted both to get hurt.
  Santa: He wanted a bike, he got a banana! [laughs maniacally] Did you see the look on that kid's face? Didja? Didja? [laughs again] I love this job!
  Rudolph: Frankly, I think Santa's lost his mind.
• Balloon Belly:
  • Weasel in "I.R. in Wrong Cartoon", after eating a large amount of pies made for him by Cow.
  • Baboon gets this in "Dessert Island", as he's eating all the confectioneries on the island.
• Bankruptcy Barrel: In the episode "Baboon Man and Boy Weasel", Baboon and Weasel are a pair of costumed crime-fighters who search for a pants thief. The pants thief's victims are shown to be wearing barrels after losing their pants.
• Batman Parody: "Baboon Man and Boy Weasel".
• Beneficial Disease: Played with when it comes to Chronic Crying Syndrome. When it's present in populations at a low intensity, it's a vital source of water. Make the concentration too high, as Weasel does when infecting himself to replenish the water supplies around his medical clinic, and the entire Earth can flood.
• Big Ball of Violence: The ending of "A Tree Story" has the trees arguing, which eventually leads to them having a tree fight. Baboon finds this exciting and decides to join in by jumping straight into the dust cloud.
• Big Damn Reunion: In "The Legend of Big Butt", the Red Guy pretends to be Big Butt to get attention from his dad, a.k.a. Bigfoot, whom he hasn't seen since he was nine. During their expedition to find Big Butt, Weasel and Baboon run into Bigfoot, so they're able to facilitate a reunion between the two.
• Big Eater: Loulabelle is shown to be this in "I.R. Ice Fisher".
• Bigfoot, Sasquatch, and Yeti: "The Legend of Big Butt" has Weasel and Baboon searching for the mythical creature Big Butt, who turns out to be none other than the Red Guy. Along the way, they not encounter Bigfoot (who has one gigantic foot and turns out to be the long-lost father to Red) but Bigeye ( "This is getting stupid."). At the end of the episode, a Yeti makes a cameo appearance along with the Loch Ness monster, a UFO, Santa Claus, the Easter Bunny, and the Tooth Fairy.
• Bilingual Bonus: "I Are a Artiste" has Red Guy running a parody of the Moulin Rouge named Derriere Rouge, which is french for "Buttocks Red".
  • The same episode has a transition card that reads "Later... back in Estats Unis", which is a misspelling of the French word for the United States ("États Unis" and should be pronounced "Etass-Oonee"), that the Red Guy hilariously mispronounces with no attempt to pronounce it in French as Ehstats-Ooniss.
• Boot Camp Episode: "Enemy Camp".
• A Boy and His X: "I Are Good Dog!" has Weasel and Baboon being adopted by a young boy named Timmy that forms a bond with them.
• Brain Food: "Leave it to Weasel" has Weasel and Baboon as replacement kids eating brainloaf for dinner, as their temporary parents believe that it will make them smarter.
• Brainy Baby: "I Am My Lifetime" shows that Weasel was intelligent and articulate ever since he was a newborn.
• Breaking the Fourth Wall:
  • In "I.R. Mommy", the Red Guy is surprised that Supercow has found him in an I Am Weasel cartoon (this was his first appearance in I Am Weasel).
  • After discovering that the entirety of "I.R. Wild Baboon" happened to be a dream of Cow's, Weasel begins to tell the viewers they should wake him up.
  Weasel: Will someone please do me a favor? Go to my house, and wake me up. [Iris Out] No, don't iris out yet! I'm serious—wake me up!
  • In "My Blue Hiney", after it is revealed that the events of the story were completely fabricated by Jolly Roger, Weasel addresses the viewers to explain that the events of the cartoon they just watched are false and to forget what they have watched.
  • "I Am Whale Captain" ends with Red Guy showing up at the very end, complaning that he was not featured in the episode and states his contract was violated, only for him to technically have appeared, meaning that the contract is still kept intact.
    The Red Guy: Hello! It's me, Lance Sackless! [laughs] As you may have noticed, I am not in this film. [whips out his contract] This is my contract, [in an annoyed drawl] and it has been violated! [angry] I'm supposed to be in this show! Oh. [laughs] But I'm in the show right now. [examines his contract, coming to a realization] Never mind! [laughs as there's a Fade Out]
  • A few episodes ends with Weasel (and in one occassion Baboon) wanting the episode to be over since they already have suffered enough.
    Baboon: Please ending cartoon! I.R. humiliating enough for one day! [Iris Out] thank you!
  • The short "How to Draw Weasel" sees Weasel inviting viewers to draw him, smashing his face into the screen so that he can he traced. Baboon notices this and removes Weasel, wanting the viewers to draw him instead. They then start to argue until the runtime is over.
    Weasel: Oh, great. Now our twenty seconds are up.
    Baboon: I.R. shame.
• Breakout Character: A full series spun off from Cow and Chicken.
• Butt-Monkey: I.R. Baboon (more noticeable in the early seasons). Quite literally, too. Weasel would also develop his fair share of bad luck in later episodes as well (Thus toning down his "Mr. Perfect" character).
  • Lampshaded in "I Are Terraformer" in which a robot beats up Weasel several times for trying to terraform a planet without joining the Robot Union. Baboon then laughs at Weasel and states that he is usually the one who gets hurt all the time.
• Call-Back: The short "I.R. Tries to Drive" has Baboon wanting to drive Weasel's car, in which Weasel reminds him that the last time he drove, something terrible happened. This is a reference to the episode "Driver's Sped" in which Baboon was a terrible driver and caused havoc around the city.
• The Cameo: "I Am My Lifetime" features a bunch, as the main characters are in different retirement communities. In the old cartoon stars retirement home with Weasel are Cow and Chicken, Dexter, Doggie Daddy, Jonny Quest, and Quick Draw McGraw. Over at the sidekicks retirement home with Baboon are Boo-Boo, Hadji, Baba Looey, Betty Rubble, Pebbles, and Bamm Bamm. And over in the old cartoon villains asylum with the Red Guy are Ranger Smith and Mr. Slate.
  • A picture of Loulabelle◊ can be seen above Baboon's prison bed in "I Stand Corrected". This was after she was written off the show.
  • Cow appeared earlier in I.R. Mommy in her "Supercow" ego.
    'The Red Guy ': Supercow! What are you doing here? (chuckles) I thought you'd never find me hiding out in a Weasel cartoon! Wanna dance?
• Can't Live With Them, Can't Live Without Them: In "I.R. in Wrong Cartoon", Weasel goes to live with Cow (from Cow and Chicken) after she fishes him out of the TV. At first Weasel enjoys his new life since Cow feeds him all the pies he can eat. When they decide to watch TV to see how Baboon's doing, at first he's excited at the idea that he has his own show now that Weasel is gone, but quickly comes to realise that he doesn't want to do a show without Weasel and cries out for him to come back.
• Captain's Log: "The Drinking Fountain of Youth" features Weasel and Baboon as a captain and first mate on a ship to search for Nopants De Leon (The Red Guy). Weasel is doing the traditional approach with paper, and Baboon is using an actual log. Eventually, Weasel runs out of paper and has to use Baboon's log.
• Catchphrase:
  • Weasel's is "I am Weasel!" It's usually said when he does something heroic.
  • I.R. Baboon has "You talking to I.R.?" in the later seasons.
  • The Red Guy would say "Is that a crime?" whenever Weasel called him out on his antics. Weasel would occasionally reply with "Why yes it is."
• Cat Up a Tree: "Mission: Stupid" has Weasel and Baboon as troops enlisted in the U.S. Ground Force and must rescue a lone kitty stuck in a tree.
• Caveman Courting: The Red Guy, this time depicted as a cavewoman tries to get Weasel to court her insisting that he clubs her and drags her by the hair; Weasel of course wants none of that.
• Characterization Marches On: I.R. Baboon was much more overtly antagonistic towards Weasel in the earlier seasons, usually trying to (unsuccessfully) upstage or sabotage him. Once the Red Guy was transplanted from Cow and Chicken, Baboon and Weasel started gravitating towards Vitriolic Best Buds. Weasel himself also was far more heroic and incorruptible until he became a Broken Ace Only Sane Man that shared the suffering with Baboon despite his efforts.
  • The creator has said that they are best friends, they just act like enemies.
• Cheek Copy: The short "Fun at the Cartoon Studio" has Weasel chastising Baboon for copying his butt, only to get tempted into doing himself when his boss, the Red Guy, catches him.
  Red Guy: Good heavens, Mr. Chipmunk! What kind of business do you think we are running here?
  Weasel: A cartoon studio?
  (cut to all three copying their butts at once)
• Christmas Episode:
  • "Happy Baboon Holidays", where I.R. Baboon's family visits him for Christmas.
  • "I.R.'s First Bike", where I.R. gets a bike for Christmas.
  • Apparently, Cartoon Network counts "Dessert Island" from Season 3 too... probably because of the Gingerbread Men tribe, who carry candy canes like staffs.
• Comically Missing the Point:
  • "I Are Robin Hood" has Baboon taking the role of Robin Hood, in which he believes that he should only rob from people named Rich.
  • In "I.R. Pixie Fairie", Pixie Weasel wants to be re-elected as president for the Pixie Baboons home, only for one of them to get sick of Weasel's leadership and wants to become president, which results in all the Pixie Baboons fighting over who becomes the leader. Pixie Weasel then reminds the Baboons that the election isn't until next month, meaning that he's still the president for 4 more weeks. Uncle Breezybum (The Red Guy) then pops in and suggests the Baboons to impeach president Weasel. The Pixie Baboons then start to throw peaches at Weasel until he leaves their home.
• Comically Oversized Butt: I.R. Baboon, considering his species and all, has a huge red butt that is milked intensely for humor, and it even killed the dinosaurs.
• Comic-Book Adaptation: Comic stories starring I.R. Baboon and I.M. Weasel were featured in Cartoon Cartoons, Cartoon Network Starring, and Cartoon Network Block Party.
• Complaining About Rescues They Don't Like: Baboon hates it when Weasel saves him, because he knows that's only going to make Weasel even more beloved by the public.
• Conjoined Twins:
  • In "I Stand Corrected", one of the inmates at the correctional facility has a "Fred" device attached to his backside. When removed, he turns out to have a full conjoined twin stuffed under there somehow.
  • Baboon and Weasel speed past a pair of conjoined twins and cause them to separate in the episode "Magnificent Motorbikini".
• Continuity Nod:
  • Jolly Roger's opening song in "Unsinkable I.R." is a reference to the same song he sang during his debut in the Cow and Chicken episode "Pirate Lessons".
    (Cow and Chicken Season 2 episode Pirate Lessons)
    Jolly Roger: Hey, hey, hu, hu! I am Jolly Roger! Hey, hey, hu, hu! I'll be a flag for you!
    (I Am Weasel Season 3 episode Unsinkable I.R.)
    Jolly Roger: Hey, hey, hu, hu! I am Jolly Roger! Hey, hey, hu, hu! I'll be a lookout guy for you!
  • Weasel's Hero License in "I.R. Role Model" shows him being an organ donor. In the first episode "This Bridge, Not Weasel Bridge", Weasel donated one of his kidneys to a sickly boy.
• Crapsack World: It often seems that the entire universe of the show is as brainless as Baboon, with Weasel as the Only Sane Man.
• Criminal Doppelgänger: In the first issue of DC's Cartoon Cartoons comic books, Who Are Baboon features a doppelganger of I.R. who is an evil bank robber named U.R.; in-universe, they are difficult to tell apart, however U.R. is distinguishable from I.R. with his green shirt that read "U.R." and his curly hair.
• Crossover: "Back to School" had Weasel and Baboon returning to school, and they are placed in Cow and Chicken's class.
  • Before that, "I.R. in Wrong Cartoon" and "Who Rubbed Out Cow and Chicken?" had the casts of the two shows crossing over.
• Crossover Punchline: A couple of times with Cow and Chicken.
  • "I.R. Wild Baboon" is revealed to be a bad dream Cow had.
  • In "I Are Good Salesmans", Weasel's co-host is a Manure the Bear toy, which is revealed at the end to be Cow's.
  • In "The Wrong Bros", it turns out Chicken was watching The Red Guy's documentary on the titular Wrong Bros.
  • In "I Are Legend", Cow and Chicken are among the people watching Weasel on TV.
• Crying a River: In the episode "I Am Crybaby", several people cry so much that they flood the room and cause a waterfall. And in the last part, I.M. Weasel ends up flooding the planet with tears.
• Cymbal-Banging Monkey: The title card◊ of "I Are Music Man" shows Baboon playing the cymbals, despite the episode being about him playing the theremin.
• Depending on the Writer: The relationship between Weasel and Baboon and the Cow and Chicken cast varies. Sometimes I Am Weasel is a Show Within a Show in the Cow and Chicken universe, with Weasel and Baboon being either fictional or Animated Actors. Sometimes, Weasel and Baboon are real people within the universe.
• The Devil Is a Loser: Red Guy becomes a recurring sorta antagonist in the second season. Sometimes he's running an aimless scam or committing fraud. Sometimes he's the Damsel in Distress Weasel and Baboon need to save. And sometimes he's just kinda there, being weird and stupid.
• Diegetic Soundtrack Usage: In "I Are Music Man", Red Guy not only plays Baboon's leitmotif on his theremin, but he also plays and sings the theme song as well, with only slightly altered lyrics:
  You don't need pants for the victory dance
  Baboon's better than Weasel!
  I.R. Baboon big star of cartoon
  Explode goes the Weasel!
  I.R. Baboon reigns king in his mind
  He's just as good as the weasely kind
  But round every corner, he's likely to find...
  Explode goes the Weasel!
• Different in Every Episode:
  • Weasel and Baboon's circumstances. One moment, they're tiny fairies inside a sponge—the next, they're on the hunt for Big Butt.
  • The Red Guy's disguises, as is the case in Cow and Chicken.
• Digging to China: In "I Are Music Man", the San Andreas Fault is triggered by the specific wavelengths of Baboon's theremin, causing it to open and send him all the way to China.
• The Ditz: The main reason I.R. Baboon fails to be as good as Weasel in anything is that he's very dumb.
• Don't Try This at Home: "Time Weasel" featured the creation of onion rings by putting onion rings all over someone's face and then sticking said face in a vat of boiling oil. The creator acknowledges that the man about to undergo this is "a professional boiling-oil stuntman" and adds that you really, really don't want to try doing this at home.
• Double Entendre: In "Unsinkable I.R.", Weasel turns to Baboon and says: "Mr. Baboon! Where is the first mate?", to which Baboon replies "Oh, he's down in the hold... waxing the dinghy." And then immediately the camera begins to pan downwards through the boat towards the hold.
• Downer Ending:
  • Weasel and Baboon both inadvertently kill all life on Earth on two separate occasions (see Mike Nelson, Destroyer of Worlds below). Played for Laughs in both cases.
  • The series finale "I Are Legend" ends with Weasel not only failing to unglue everyone from their T.V.'s, but also realizing they only watched his show because of Baboon and never found him entertaining in the slightest.
    Weasel: It was Baboon all along, and not me, that everyone was watching! [growing despondent] I am not a legend, I am a tool!
• Dragged into Drag: Part of the Fraudian excuse of the Red Guy, as Sigmund Fraud, for defrauding Weasel and Baboon into thinking he was a licenced psychiatrist is that he was forced to wear the top of a prom dress by a pair of Trickster Twins, obviously becoming traumatized as a result.
• The Dragon Slayer: "I Am Dragon Slayer" has Knight Weasel training Baboon to become a knight so he can assist him to defeat the dragon.
• Dream Episode: Quite literally with "Dream Weasel", which has Weasel creating a device that controls peoples' sleeping patterns, and decides to use it in order to help give the public their ability to dream again.
• Dr. Fakenstein: "I Am Fraken-Weasel" has Weasel playing the titular Expy (actually a dentist who was trying to go back to his Mad Scientist roots), complete with I.R. Baboon as The Igor.
• Drives Like Crazy: The short "I.R. Tries to Drive" has I.R. Baboon asking Weasel if he can drive his car. Weasel refuses as last time that happened, something terrible has happened. He does so anyway, but he ends up driving so fast, it lead to the car crashing it to the moon.
  Weasel: You are never driving my car again.
• Driving Test: "Driver's Sped" has a poetic Baboon taking his driver's license with Weasel as his instructor, the ending reveals that he was actually trying to get his poetic license.
• Drop-In Character: Loulabelle the nurse, Weasel's main squeeze, at the beginning of Season Two... however, see Put on a Bus below...
• Dumbass Has a Point: Baboon is dense as a sack of hammers, but even he gets it right sometimes.
  • In a "A Troo Storee", Weasel has to hire Baboon to write a book for him which he believes will make people smarter. When this goes as well as you'd expect, this exchange occurs:
    Weasel: Don't you see what this means, you brainless louth? You wrote a book so bad that it makes people stupid instead of smart! Why did I trust you? What was I thinking? Your book has ruined the world!
    Baboon: You say book is bad? But you never even read it yet!
    • Baboon's point is later proven when Weasel, not wanting to be the only smart person in a world of idiots, reads the book and, despite being less than impressed with it, finds that it doesn't make him any less intelligent. It's just that everybody else is already that stupid to begin with and he didn't notice until now.
  • In "I Bee Weasel", Baboon has to communicate the location of a bed of flowers through dance. After repeatedly getting bees killed with bad dancing, Baboon asks Weasel why he can't just tell the bees the location of the flowers verbally. Weasel concedes the point and proceeds to tell the Queen.
• Early-Installment Weirdness: Season 1 had animated title cards that featured Weasel scampering onto a tree stump and reading the episode's title out loud. Sometimes Baboon would also appear and suffer some manner of Amusing Injuries. Later seasons dropped these for non-animated title cards like those in Cow and Chicken.
• Earth-Shattering Kaboom: Happens at the end of "The Hole" (which gets plugged, only for it to turn out to be connected to a ground-level volcano), complete with various objects flying from the explosion such as buildings, cars, and even a pork butt on a plate!
• E = MC Hammer: Weasel's answer to what 2 + 2 is in "Back to School".
  Weasel: Excuse me, if I may? Due to the true nature of any given principle of quantum mechanics, if every point is the center of the universe, and infinity fills every point, then two plus two actually equals infinity.
• Emergency Cargo Dump: Parodied in "I Am Bush Pilot." After delivering hundreds of babies in midflight, the sudden additional passengers weigh the plane down, causing Weasel to lose altitude, so Baboon works to lighten the plane; he throws out Red Guy (who was the stewardess), various crates of cargo, a two-ton man named Tom, and even tries chopping the tail of the plane off. In the end, however, Weasel manages to make an emergency landing in the very lake he was flying his passengers to.
• Evil Lawyer Joke: In "Law of Gravity", Weasel reprimands Baboon for causing the world's lawyers to float away after he destroys the paper documenting the law of gravity. Baboon replies by asking why the lawyers floating away is a bad thing.
• Extreme Close-Up: In the short "How to Draw Weasel", Weasel smashes his face into the screen so that he can be traced by the viewers.
• The Faceless: Eugene Oregon in " I Am Ambassador".
• "Fantastic Voyage" Plot: Occurs in the episode "The Incredible Shrinking Weasel", where Weasel and Baboon shrink to get inside the Red Guy's body and fix a crack in his butt bone.
• Fed to the Beast: After Weasel refuses to kill Baboon in "I Are Gladiator", the Roman emperor Gluteus Maximus (The Red Guy) puts them against the lions so they can be eaten. The lions enjoy it at first, but then gets bored after several hours and wants to chew up something with more meat on it, which leads them to attack Red Guy.
• Firehouse Dalmatian: The episode, "I.R. Role Model", has an unnamed Dalmatian, simply referred to as "Fire Dog", who is owned by Weasel and resides in a firehouse with him.
• Fountain of Youth: Featured in the episode "The Drinking Fountain of Youth" that Nopants De Leon (The Red Guy) has been hogging for 500 years. He and Baboon drink it at the end and later gets turned into babies.
• Fractured Fairy Tale: The episode "I.R. Pixie Fairy" as part of "Uncle Breezybum's Storybook Corner."
• Frame-Up: "I.R. Role Model" has fireman Weasel saving a woman (The Red Guy) from a fire, but everyone thinks Baboon did it and Weasel is framed for starting the fire. Weasel explains that he couldn't have done it as he is a fireman, but the Red Guy convinces the townspeople that Weasel starts fires as a fireman instead of stopping them. It's later revealed that it was actually Red Guy who started the fire.
• "Freaky Friday" Flip: "I. Architect" sees Weasel and Baboon's brains switched after an accident. Baboon becomes a hero to the people of New York City while Weasel acts like a total idiot, and is "gifted" a mandatory retirement. Notably, they don't switch voices, just speech patterns.
• Freeze-Frame Bonus:
  • The dictionary◊ Baboon is reading in "Ping Pong at Sea" is filled with gag descriptions of words starting with "W". It also includes a Shout-Out to Dexter's Laboratory.
  • In "I.R. Role Model" you can see a quick glimpe of Weasel's Hero License◊, which reveals extra details about him, including his age, height and him being an organ donor.
  • Some of the books◊ at the beginning of "I.R. Gentleman's" are titled "The Feisses", "Wances", "The Steeles" and "How to find your own Mum". "The Feisses and "The Steeles" are reference to creator David Feiss and Season 1 director Robin Steele.
  • In "I Am My Lifetime" the names of the babies◊ in the nursery room are Donnie Watson, Scottie Morse and Davey Feiss. This is a reference to background colorist Don Watson, art director Scott Morse and series creator David Feiss.
  • In "Driver's Sped", you can spot◊ Cow inside a bus when Baboon is speeding across the city.
  • In "I Are Good Dog!", we can see a quick glimpse of the letter◊ Baboon wrote to Timmy after he ran away from home, complete with terrible grammar and letters being in the opposite side. It reads "Deer Tinmy, I are running qway 4 FR Bekawz Y Loving Weezil More. I.R Baboon".
  • The book "When Weasels Attack" from the episode "Enemy Camp" is written by Nora Johnson, named after a writer/storyboard artist of the show.
  • The newspaper◊ that Baboon is reading at the beginning of "Baboon Man and Boy Weasel" has a headline that reads "Man finds greeny thing in his nose, is it an Alien?". This is difficult to notice when watching the episode due to Baboon reading the newspaper upside down and is constantly moving.
  • "I.R.'s First Bike" has Baboon getting hit by a plane when trying out his gyroscopic-powered bike, the name of the plane is Facial Air.
  • "A Troo Storee" shows Red Guy also wrote a book: "Red Like Me". The cover, of course, features his butt.
  • The same episode also features a book called "My Life" written by Narc Erry, which is a reference to Marc Perry, a storyboard artist of the show.
  • The branding◊ Red Guy receives at the end of "Rodeo Weasel" reads "Bar Happy Acres Ranch and Bed and Breakfast".
• Freudian Couch: "He Said, He Said." features Dr. Sigmund Fraud (The Red Guy) switching back and forth between Weasel and Baboon, who both sit on their respective couches complaining about each other. It turns out, Red isn't a psychologist at all; he crossed out the "OTIC" in "PSYCOTIC" on his degree and wrote in "IATRIST".
• Freudian Excuse: Three from the Red Guy, all revolving around incidents which happened when his disguised persona was nine.
  • In "He Said, He Said", it's a Fraudian Excuse. After the Red Guy, as Sigmund Fraud, is revealed by Weasel to have a fraudulent licence to practice therapy, he breaks down and admits the truth. Weasel offers to hear him out, whereupon he tells Weasel and Baboon that his troubles began when he was nine. He went to school without pants, not realizing he'd be punished for it, and had to put up with a grandma who wouldn't let him play on a swingset and with a pair of twins who forced him into the top of a prom dress. Apparently, this process sounds awful.
  • In "I Am Hairstylist", the Red Guy, the sole member of the Hair Police, explains to Weasel why he hates barbers and is so anal about hairstyles. When he was, again, nine, his dad would take him to a barber shop where he was mocked by the older, short-haired customers for having long, blond locks. On one visit, his dad asked the barber to give him a "regular boy haircut" of a similar length. He didn't want this, not believing himself to be a regular boy, and was resultantly traumatized.
  • At the end of "The Legend of Big Butt", Weasel and Baboon discover that the eponymous monster they've been searching for is actually the Red Guy. When confronted, he reveals he wanted to get attention from his dad—who's Bigfoot, for some reason—after he was abandoned when he was, yes, nine. Because Weasel and Baboon ran into Bigfoot on the way, they're able to facilitate a Big Damn Reunion.
• Friendly Local Chinatown: Appears in "The Baboon's Paw", complete with a dragon dance that terrifies Baboon.
• Friendly Neighborhood Vampires: Weasel and Baboon in "I Am Vampire". Too bad the local vampire hunter, Van Smellsing (the Red Guy), is convinced that all vampires are evil monsters.
• FTL Travel Sickness: Played for humor in "The Magnificent Motorbikini". Weasel and Baboon are riding on the titular contraption as it passes the speed of light, and other speeds as well.
  Weasel: We just passed the speed of smell! Next is the speed of light!
  Baboon: What's after the speed of light?
  Weasel: Any third-grader knows that! After the speed of light—
  [the bikini's speed increases, and they're suddenly morbidly obese]
  Weasel: [Heavy Voice] It's the speed of heavy.
• Furry Confusion: "Enemy Camp" features savage non-anthropomorphic weasels attacking Red Guy as he's dressed as a baboon, believing that they are natural enemies. Interestingly, I.M Weasel is watching, but doesn't comment on this.
• Furry Reminder: Weasel's love for eggs, which is partial Truth in Television. Weasels don't actually suck the yolks from eggs, but they do love them.
  • Early episodes often had Weasel scurrying on all fours like a real Weasel, as seen in the intro and Season 1 title cards. This is mostly dropped later on.
• Giant Squid: One appears in "I Am Whale Captain" and tries to attack the titular whale, only for it to be revealed to be a female squid that has a crush on the whale.
• Girls with Moustaches: One of the three children that goes with Baboon in "Deep Sea Tour" is a bearded girl. Baboon being confused over this questions it.
  Baboon: Why little girl have beard?
  Girl: Well, my mom was a lady, and my dad was a man.
• Gladiator Games: "I Are Gladiator" has Weasel and Baboon battle each other as gladiators in the Roman times.
• Going Down with the Ship: Subverted in "Unsinkable I.R.". A ship captained by Baboon begins to sink, but Baboon refuses to stay put. Instead, he forces Weasel, the inspector, to do it by shoddily adding a new rule to their rulebook: "The Stoopid Weezle always goes down with his ship." "So long, folks!" Weasel tells the viewers as he descends into the ocean.
• Go-Karting with Bowser: Though Baboon and Weasel were usually at odds, there were episodes where they were comrades. By the end of the show's run they are more or less Vitriolic Best Buds.
• Good Angel, Bad Angel: In "I Am Crybaby", I.R. Baboon hallucinates that he has a shoulder angel and a shoulder devil resembling the Red Guy.
• Good Luck Charm: The short "Lucky Charms" has Weasel and Baboon wearing lucky charms as they are swimming from the English Channel to France. Weasel manages to swim safely while Baboon is being chased by a shark, as his lucky charm was a ham.
• Grand Finale: "I Are Legend" has Weasel voluntarily ending his own show after he finds out that everyone in town spends more time at home watching TV instead of going outside and living their lives.
  Weasel: [with dramatic gestures and Declarative Fingers] I must stop I Am Weasel so that the world can free themselves from the slavery that is their televisions! I must liberate them from the terror that is my show! The people must once again venture forth and breathe deeply the fresh air of outside! I will end my show now, for I am Weasel!
• The Great Flood: When Weasel gives himself Chronic Crying Syndrome to replenish the water supplies around his medical clinic, he sobs so much, the entire Earth is submerged.
• Half-Dressed Cartoon Animal: Baboon, always. Weasel's various outfits only occasionally come with pants.
• Happy Dance: Baboon often does one. Originally, it was the Red Guy's in the Cow and Chicken pilot, "No Smoking."
• Heart Beats out of Chest:
  • Happens in "I Are Ghost" when Weasel as a ghost gets scared by Talulah Bottoms (The Red Guy) wearing a face mask at her bed.
  • Baboon gets this in "I.M.N. Love" when he falls in love with Cow and Chicken's Teacher.
• Hidden Depths: Even though I.R can be a jerkass at times especially the early episodes, he is also capable of committing crimes as shown in I.R Role Model where he is cunningly selling crackers at illegal prices which he somehow gets away with.
• Horny Vikings: "I Am Viking" has Weasel and Baboon as vikings who are ready, willing and able to pillage and plunder anything in sight. The King and Queen of Nopantsland (The Red Guy) kidnaps them because he wants to be pillaged, and they have to spend the entire episode teaching him how to put up a fight so they can pillage him properly.
• Hyper-Competent Sidekick: Weasel plays this role in episodes like "Baboon Man and Boy Weasel" or "I Are Robin Hood" where he is the assistant to Baboon's (of course) Idiot Hero.
• I Am Not Weasel: The Trope Namer, sort of. Weasel was often mistaken by other characters (particularly the Red Guy) as various rodents, such as a squirrel, a chipmunk, or a hamster (weasels aren't even rodents). Baboon was mistaken for various other kinds of primates like a gorilla or an orangutan. Naturally, they correct them when this happens.
  Baboon: Hey, fat old critic! Looking what I.R. drew!
  French Critic: That is so horribly out of the lines! Looks like some monkey did it.
  Baboon: I.R. no monkey! I.R. baboon!
• I Am the Noun!
• Idiosyncratic Episode Naming: Most episodes are named "I Am/I Are/I.R. ____________" (whatever applies to Weasel or Baboon for that episode).
• The Igor: Baboon plays this role in "I Am Franken-Weasel".
• I Just Want to Be Special: I.R. Baboon, if not also trying to one-up Weasel, just wants to be as revered and praised as Weasel is.
• Inelegant Blubbering: The Red Guy, as the therapist Sigmund Fraud, after he's admitted that the Fraud family are, well, frauds. This leads Weasel to offer him therapy instead, and what he reveals to Weasel and Baboon during the session is traumatizing enough to trigger this again.
• Injured Limb Episode: "I.R.'s Phantom Foot" has Baboon breaking his phantom foot after tripping over an invisible pothole when he was heading towards Weasel's house to complain about the noise. He attempts to get help from the Red Guy, who convinces Baboon to sue Weasel over his injury. It was later revealed that it was Red Guy who dug up the invisible pothole and tried to scam Weasel and Baboon for money.
• Interactive Narrator: Uncle Breezybum (The Red Guy) in "I.R. Pixie Fairie" as he's causing problems for the characters in the story. The episode ends with regular Weasel and Baboon getting revenge by altering the story to humiliate the Red Guy.
• Interspecies Romance:
  • "I.R. Plant Life" has Baboon falling in love with a thistle after he donates his veins to help it survive.
  • "Honey I Are Home" shows Weasel married a Hispanic woman named Conchita, having children who are human/weasel hybrids.
  • "I.R. Do" has Baboon marrying a hyena, but later discovers that she left him for a German hairless chihuahua.
  • "I Am Deity" ends with the inhabitants of both of the micro worlds cross pollinating, creating Waboons and Babeasels. The resulting devastation of both worlds convinces Weasel and Baboon that they must never marry and remain just friends.
• Invisible Parents: Unlike Baboon, Weasel's parents are never shown in the series. It's implied in "Ping Pong at Sea" and "Happy Baboon Holidays" that his real parents died when he was a child and went on to become an orphan that later was raised by a human family who made him the way he is today.
• Jaw Drop: Parodied in "I Am Cliched" when Weasel sees an egg on the floor.
• Joke of the Butt: A few around Baboon's, given that it's exposed, and many more around the Red Guy's, as is the case in Cow and Chicken.
• Large Ham: The Red Guy, of course, but I.R. Baboon has plenty of hammy moments as well. It helps that Charlie Adler voiced both characters.
• Last of His Kind: The titular Fred in "Fred: Last of the Idiots". A wild, dim-witted savage who communicates by hurting himself. Baboon of course, can understand him.
• Lethally Stupid: From "Power of Odor": If a methane smog is large enough to turn a whole city uninhabitable, who in their right mind would throw a lit match in the center of the cloud? Justified in that the characters in this show typically are all idiots.
• Lightning Can Do Anything: Happens to Red Guy in "I Am Franken-Weasel" where Baboon finds him in the cemetery and brings him to Fraken-Weasel who decides to resurrect him, blissfully unaware that he's alive. This causes Red Guy to transform into a Southern Belle. Franken-Weasel then declares it as a monster.
• Longer-Than-Life Sentence:
  • "I.R. Wild Baboon" has Weasel facing several life sentences for letting Baboon go down a waterfall in his trailer.
  • In "I Stand Corrected", Baboon is sentenced to 99 years in a correctional facility for being furless on a Tuesday. Weasel ends up forced to serve the sentence with Baboon because of a Kentucky law forbidding judges from being hairy, short, and having beady eyes.
• The Maker: "I Am Deity" has Weasel and Baboon concoct life, but Baboon starts to become jealous when Weasel's world evolves faster than his.
• Mike Nelson, Destroyer of Worlds: I.R. Baboon in the third season episode "The Hole", when he plugs up a large hole that turns out to be a "ground-level volcano". The resulting build-up of pressure causes an Earth-Shattering Kaboom.
  • Weasel himself in the second season episode "I Am Crybaby". He cures a disease that causes people to cry perpetually, but it turns out that the victims of that disease were responsible for the existence of all the water on Earth. Weasel gives himself the disease in order to restore Earth's water supply, and cries so much that the entire planet drowns in his tears.
• Mind Screw: In "I Are Legend", Weasel, Baboon and the Red Guy believe they are the last people on Earth, after finding all the streets deserted. It later turns out that everyone is just at home, watching I Am Weasel on television. The very same episode in fact. One shot even shows Weasel standing in front of the television that shows him standing in front of a television that shows him standing in front of a television that shows him standing in front of a television... you get the picture.
  • Another episode called "Dessert Island" has Weasel and Baboon wake up on an island where everything is made of candy, and is inhabited by a tribe of gingerbread men. It later turns out the island is actually an ice cream sundae. And it's about to get eaten.
• Monkeys on a Typewriter: "A Troo Storee". The old "thousand monkeys on a typewriter" idiom... who are insulted when Weasel tries to pay them in bananas.
• Monstrous Germs: "The Incredible Shrinking Weasel" has a purple germ disguised as a truck driver who carries a truckload of flu and is heading right towards the Red Guy's stomach. Fortunately Weasel manages to stop him.
• Mood Whiplash: The ending of "My Friend, the Smart Banana" has the titular banana in his deathbed, and is about to die due to old age (he is a banana, after all). Weasel and Baboon then goes from mourning the banana's death to happily enjoying some banana cream pie made from the banana.
  Weasel: You know, this is the best friend that I ever had.
  Baboon: For dessert! (he and Weasel laugh)
• Mountain of Food: Weasel and Baboon land on a dessert island.
• Multiple-Choice Past: Weasel. In "Happy Baboon Holidays", he is said to be an orphan that was raised by an "extended family" of famous historical figures. But much later, in "The Legend of Big Butt", he laments not having become an accountant like his mother wanted.
• Mundane Made Awesome: Baboon and Weasel in a ping pong tournament. With electric guitars!
• My God, What Have I Done?: After being convinced Weasel has swiped his family for the Christmas celebrations, Baboon bitterly sneaks into his house and sabotages the festivities. He arrives back at his house, suddenly realizing the cruelty of his actions and bursts into tears.
  Baboon: [sobbing] I.R. bad person! I.R. person bad!
• Naked People Are Funny: I.R Baboon and his big red butt. The very first line of the theme song calls attention to it.
  • There's also I.B. Red Guy a.k.a. The Red Guy from Cow and Chicken.
• Nice Guy: I.M. Weasel
• Niche Network:
  • The Airplane Channel.
  • At the end of a Wright Brothers documentary, the brothers decide to toast with a root beer float, after which the channel inexplicably becomes the Root Beet Float Channel.
  • The Wright Bros. episode also had an unknown channel where a horse punches a cowboy, The Cat Shaving Network, and The Grandma Channel.
• Non-Standard Character Design: The picture◊ of Martin Luther King Jr. in "Happy Baboon Holidays" is drawn much more realistic compared to the more cartoony Founding Fathers and Richard Nixon.
• Nurse with Good Intentions: Loulabelle herself.
• Ocular Gushers: Exaggerated. These affect those infected with Chronic Crying Syndrome to such a degree, they serve as a vital source of water.
• Oh, Crap!: At the end of I.R Role Model, Baboon’s scheme on selling crackers at unlawful prices is revealed by Weasel much to the anger of the Red Guy who decides to beat him up along with her kids for revenge for being swindled, causing a frightened I.R Baboon to run for his life with the Red Guy and her kids chasing him hell bent on making him pay for his crimes.
• The Olympics: "The Sackless Games" has Lance Sackless (The Red Guy) creating his own athletic games with Weasel and Baboon as his only contestants. Events include 100-yard dash with old man handicap, Horse Toss and Parallel Bar and Grill.
• Opening Shout-Out: "I Architect" ends with Baboon, having the brain of Weasel being elected King of New York and is about to get his picture taken. He then poses in front of the "I Am Weasel" logo seen in the opening, but is instead written as "I Am Baboon".
• Orange/Blue Contrast: An orange weasel and a blue baboon are the stars of the show. 
• Our Time Machine Is Different: "Time Weasel" has Time-traveling underwear.
• Parent Never Came Back from the Store: In "The Legend of Big Butt", Red Guy's father Bigfoot said he was going to get milk when he left him at age 9.
• Parody Sue: In early episodes, Weasel played The Ace rather genuinely. As the seasons progress, however, he becomes a more pretentious Small Name, Big Ego that suffers due to living in a world of fools.
• Perfect Disguise, Terrible Acting: The Red Guy has a bad habit of this. Spot-on, his costumes may be, but he never acts as those in his roles should, being as nasty and manic as he is undisguised. The only reason he's not caught out is that he's Satan in a World of Dumbass.
• Phlebotinum Killed the Dinosaurs: "Time Weasel" shows that the dinosaurs went extinct because they laughed at Baboon's red butt so hard, that they fell off from the corner of the flat earth.
• Piano Drop: Parodied in "I Am Cliched" (see Anvil on Head above).
• Pie in the Face: One of the cliches featured in "I Am Cliched".
  • "Enemy Camp" starts with Weasel and Baboon throwing pies at each other, but Baboon can't remember why they are fighting. After the episode is told, Baboon puts a brick inside a pie and throws it at Weasel, which he narrowly avoids and it instead hits Red Guy in the face.
• Prison Episode: "I Stand Corrected" focuses on Weasel and Baboon in prison. Technically, it's called a Correctional Facility, but is portrayed very much like a prison.
• Punctuated! For! Emphasis!: Weasel's name declaration, though subverted in that the punctuation is actually his initials (I.M. Weasel).
• Punishment Box: In the episode "I Stand Corrected", Weasel and Baboon are sent to a correctional institute that utilizes one of those boxes. Jailkeeper Red Guy doesn't seem to understand how they work considering he only locks himself inside them.
• Put on a Bus: After appearing regularly throughout Season Two, and in the Season Three premiere, Loulabelle was written off the show, after Cartoon Network complained that she was a dumb blonde stereotype.
  • Cartoon Network also didn't like the character Jolly Roger for reasons David Feiss (the show creator) doesn't understand, but thinks it's because Jolly Roger made fun of people with speech impediments while Cartoon Network claimed it was because he was too similar to The Red Guy.
• Raised by Humans: "I Are a Artiste" and "I Am Hairstylist" reveals that Red Guy's parents are humans.
• Raised by Wolves: "I.R. Mommy" has Baboon raising a human baby that he found in a cornfield and names him "Baby Grandpa". Surprisingly enough, he is actually a competent parent, which even surprises Weasel.
• Refuse to Rescue the Disliked: In "I.R. on Sun", NASA manipulates Baboon into going on a Suicide Mission to fly a rocket ship to the Sun. Weasel, angry at Baboon's disregard of his warnings and remembering all the pranks Baboon had pulled in the past, drives off and seriously considers letting Baboon die in the mission by doing nothing. However, it doesn't take long for Weasel's conscience to get the better of him and he quickly goes back to save Baboon.
• The Rival: Baboon in earlier seasons. Toned down in later episodes.
• Rules of the Road: In the opening credits, Weasel's driving a convertible with a hot blonde. But he passes a road sign that reads "LOGO". He leaps out of the car in the direction the sign indicates, and jumps into the logo for the show.
• Rump Roast: Happens to Baboon in "Honey I Are Home" when he falls into Weasel's grill as he was trying to steal his pork gizzards.
• Satan: The Red Guy.
• Seahorse Steed: Appears in "I Am Crybaby" when Baboon lives underwater and pretends to be a Cowboy.
• Seeker White Blood Cells: White blood cells are portrayed as cops in "The Incredible Shrinking Weasel" and are chasing Weasel and Baboon as they believe they are intruders who are trying to hurt the body.
• "Shaggy Dog" Story: In "I Are Terraformer", Weasel and I.R. are astronauts terraforming a planet to prepare it for colonization. Their robot goes on strike, so they spend the next four years terraforming the place and building a huge futuristic colony. When the colonists arrive... they are revealed to be a termite colony who immediately proceed to trash the place. Weasel then breaks down crying.
• Shot in the Ass: Happens to Red Guy in "The Sackless Games" where Weasel and Baboon are competing in the figure skating/archery event and keeps shooting him in the butt instead of the apple on his head.
• Shout-Out:
  • In "I Am Ambassador", Baboon is required to provide the French-Canadian Beavers with copies of The Friendly Giant, Mr. Dressup, Rocket Robin Hood and ''The New Adventures Of Pinocchio"—all Canadian TV series.
  • The asp motel in "Queen of Denile" has a sign that reads "Free HBO".
  • "Unsinkable I.R." has a scene where Captain Baboon is rotating the ship helm while whistling.
  • "I Am Cliched" features parodies of A Wild Hare, Wile E. Coyote and the Road Runner and The Young and the Restless.
  • "Who Rubbed Out Cow and Chicken?" is one to Who Censored Roger Rabbit? with a similiar story of figuring out who's erasing the characters.
  • "Leave it to Weasel"'s title is a direct reference to Leave It to Beaver.
  • "The Sorcerer's a Dentist" is a reference to the Sorcerer's Apprentice segment in Fantasia, with Weasel wearing a cloak and hat similiar to the one Mickey Mouse is wearing.
  • The baseball game that Weasel and Baboon are watching in "Take I.R. Out to the Ballgame" is the World Serious game
  • The same episode also has Baboon climbing on top of the baseball gate with his arms hanging out while shouting "I.R. King of World!".
  • The hotel "I Are Bellhop" takes place in is called Rump Plaza Hotel.
  • Red Guy's alias when he gets hit by a lighting in "I Am Franken-Weasel" is a Southern woman named Scarlett O'Hiney.
• Shrink Ray: Parodied in "The Incredible Shrinking Weasel" in which Weasel and Baboon are doctors and shrink themselves in order to perform a surgery from the inside of a body. Baboon is tasked to build a shrink ray, but instead hires a large man named Ray that shrinks Weasel and Baboon by shoving them into a hypodermic needle that is used to inject them into the patient.
  Weasel: Next time, I'm developing the shrink ray.
  Baboon: I.R. sorrow.
• Shrug Take: When Baboon asks a bearded lady who she has a beard, she answers that "Her mother was a man and her father was a woman". He tries to ponder about how that works but just shrugs later and moves along with it.
• Shrunken Organ: Weasel and Baboon get in an accident which causes their brains to fall out. Weasel has a huge brain and Baboon has a tiny brain, both disproportionate to their respective head. Understandably, the doctors get them mixed up.
• Signature Laugh: The Red Guy's quiet, smug chuckle is particularly distinctive.
• Smart Hero, Stupid Villain: I.M Weasel is an all-around genius well versed in any potential field. His rival I.R. Baboon, on the other hand, is a complete idiot who thinks he's better than Weasel. Baboon's attempts to one-up Weasel end up causing chaos that Weasel then has to fix.
• Smart Jerk and Nice Moron: Inverted. Weasel is a cultured, courteous genius, while Baboon is a petty, pompous idiot.
• Spaghetti Kiss: Happens in "Dessert Island" where Weasel blows in a choco pecan log while Baboon eats it from the other side, causing them to kiss.
• Spank of Life:
  • "I Am My Lifetime" has Weasel and Baboon being born, showing the doctors delivering them. Upon being delivered, Weasel immediately lets his doctor know he's breathing just fine and doesn't need to be spanked. Baboon, meanwhile, is spanked as normal, though not before the doctor and nurse giggle at the sight of his red butt.
  • In "I Am Bush Pilot", Weasel is an airplane pilot that has to help a large group of women get upstream where they can give birth (like Salmon). When the women go into labor during the flight, Weasel dresses as a gynecologist and prepares to help them. A Gilligan Cut later sees him back in the cockpit, visibly exhausted and telling himself he hopes he won't have to spank another baby for a long time to come.
• Spin-Off: Originally a segment in Cow and Chicken, the show continued after its parent show ended.
• Spin-Off Babies: Parodied in "I Am Cliched" as "Weasel Babies".
• Status Quo Is God: Nothing major usually changes in this show's world, although the only real major change was Character Development and Characterization Marches On for Baboon going from antagonist, to semi-antagonist, eventually becoming Friendly Enemy and Vitriolic Best Buds with Weasel. But aside from that, nothing changes between episodes.
• Strike Episode: The main conflict of "I Are Terraformer" has the robot Weasel and Baboon carrying going on a strike after I.R. throws a glass in his container, causing it to malfunction.
• Strolling on Jupiter: In one episode Weasel is an astronaut with a statue for being the first to land on Mars, Jupiter, and Uranus. Despite the latter two being a gas and ice giant respectively.
• Suddenly Shouting: The Red Guy, as is the case in Cow and Chicken.
• Surfer Dude: Two surfers serve as the antagonist in "I Am Ambassador", as they are holding 5 French-Canadian beavers as hostages at saw-point. The surfers want a forest so they can cut down all the trees and carve surfboards.
• Take That!:
  • "I Am Cliched" is pretty much a slam on Tiny Toon Adventures.
  Weasel: You're using old scripts! You crossed out Bugs Bunny, then Buster, then scribbled in Weasel!
  • One promo features Weasel explaining how Cartoon Cartoons are superior to cartoons like "Two Really Upset Otters".
  • "The Sorcerer's a Dentist" has a scene where Weasel the Wizard dentist checks on one of his patients teeth and discovers that they are incredibly rotten with flies flying around them. He checks on his magic book and describes it as the "U.K. Look" while "Rule Britannia" is playing in the background.
  • After reading Baboon's badly written book in "A Troo Storee", Weasel compares it to the works of Stephen Hawking.
  Weasel: The dialogue is poorly written—you're certainly no Shakespeare—but you do explain what it's like being a baboon in Layman's Terms, reminiscencent of Stephen Hawking's explanation of the theory of quantum gravity.
• Terrible Artist: Baboon is shown to be this in "I Are a Artiste", as he can't even color within the lines.
• Theme Song Reveal: The twist that everyone only watched "I Am Weasel" because of Baboon in the finale "I Are Legend" can be traced down to the theme song with the lyrics "You don't need pants for the victory dance, cause Baboon's better than Weasel. I.R. Baboon big star of cartoon!". Suggesting that Baboon truly was the star of the show while Weasel barged in on his plane to try and take Baboon's glory. Doubles as Foreshadowing.
• Therapist in Therapy: Zig-zagged in "He Said, He Said". The Red Guy, in his alter ego of the therapist Sigmund Fraud, attends concurrent appointments with Weasel and Baboon, listening to them complain about each other. Once their appointments are done, and he runs into Baboon, Weasel realizes Fraud is a certified psycotic, having made a pathetic effort to replace that bit of his licence with "iatrist". Fraud admits the truth, falling into a fit of Inelegant Blubbering. Taking up an offer from Weasel, he lies down on his couch, giving his clients a Fraudian excuse for his actions.
  The Red Guy: [grunts] Well, it all started when [looks away, contemplating] I was about nine. [inhales sharply] I was just a boy! I didn't know pants were required at school! [inhales again, clutching his forehead, before clenching his fist and Suddenly Shouting] Who would've guessed?
  Weasel: [to Baboon] Y'know, pal, he may be insane and a fraud, but he still needs our compassion.
  The Red Guy: [a little more vigorous] And then, Grandmama wouldn't let me play on the swings! [flops onto his stomach, growing upset] Then, those twins made me wear that dress!
  [Pounding his fists, the Red Guy begins to cry. Weasel wonders to Baboon whether he's wrong about "that compassion part."]
  The Red Guy: A top of a prom dress! [having a panic attack] Do you know that sounds like?
• Therapy Episode: "He Said, He Said", for both Weasel and Baboon.
• Third-Person Person: I.R. Baboon, though there's severe overlap with You No Take Candle.
• Throw the Dog a Bone: As early as the first season, I.R. Baboon would get the occasional happy ending. Usually after suffering abuse that was extreme, even for him. And in the end, it’s revealed the audience always preferred him over Weasel, meaning he always got the recognition he wanted.
• Title Drop: Repeatedly, given that Weasel's catchphrase is also the show's name.
• Toilet Humour:
  • "Power of Odor" involves the town becoming unbearably stinky because of I.R.'s bean-eating pigs, a not-so-subtle flatulence joke.
  • "I Am My Lifetime" shows baby I.R. accidentally putting on a soiled diaper in a flashback and the episode ends with the now elderly I.R. making that mistake again.
• Too Dumb to Live: Baboon's brain is as small as his ego is large, so when he inevitably screws something up, Weasel has to bail him out.
• Took a Level in Kindness:
  • Baboon was pretty much always portrayed as the antagonist in the early episodes, but later episodes show him being more civil towards Weasel. In fact, the two are actually friends for much of the series from that point, with the antagonist role pretty much goes to The Red Guy.
  • The Red Guy himself is much friendlier and less of a threat here compared to Cow and Chicken where he psychically harms the titular duo and tries to kill them (mostly Chicken). On I Am Weasel, he's mainly portrayed as an ally or is just overall harmless, with the worst thing he's doing is trying to scam Weasel and Baboon. That said, Weasel and Baboon aren't safe from being grievously injured by him on occasion, such as having falling anvils repeatedly dropped on them in "I Am Cliched".
• Toothbrush Floor Scrubbing: "I Are Bellhop" ends with Baboon being "promoted" from bellhop to bathroom cleaner and has to scrub the bathroom floor with a toothbrush. Baboon smugly tells the audience that he's using Weasel's toothbrush, before realizing that it's actually his own toothbrush.
• Transplant: The Red Guy from the series' sister show, Cow and Chicken, became a recurring character in season two.
  • By the last season, more Cow and Chicken characters started making sporadic appearances, including Teacher and the aforementioned Jolly Roger.
• Trapped in TV Land: Happens to Red Guy in "I.R. in Wrong Cartoon" after he falls in Cow's TV as he was trying to push a fat Weasel inside the TV. Red begs Cow, Weasel and Baboon to help him, but they decide to turn off the TV as they can't stand watching a cartoon about a guy with no pants.
• Two-Timer Date: As Sigmund Fraud, the Red Guy attends simultaneous therapy sessions with Weasel and Baboon. Neither realize what's amiss until the sessions end, and they leave Fraud's offices.
• Universal-Adaptor Cast: Weasel and Baboon could be vikings, gladiators, cavemen, vampires, worker bees...
• Universal Remote Control: Weasel uses one to rewind time in "I.R. Gentlemans" after Baboon fails to do basic table manners and eats all the food like a slob.
• Unreliable Narrator: The episode "My Blue Hiney" did a strange origin story for both I.M Weasel and I.R. Baboon (Baboon is a no-talent comedian and Weasel is a country singer who often comes to Baboon's rescue). It had an unidentified narrator with a somewhat deep Southern accent. At the end of the story, his voice drastically changes and he's revealed to be Jolly Roger, who of course made it all up.
• Vague Age: Unlike Cow and Chicken, where Cow and Chicken, at least, have set ages, the ages of Weasel and Baboon are inconsistent. According to his Hero License in "I.R. Rodel Model", Weasel is 2 years old, while Baboon stated in "I.R.'s First Bike" that he is 40. This doesn't make sense as there are some events that took place in the 1960s and 1980s, where Weasel wouldn't have been born yet and Baboon being much younger. "I Am My Lifetime" depicts Weasel and Baboon in High School and College together despite the massive age gap and where they look exactly the same as they do as adults.
• Van Helsing Hate Crimes: In "I Am Vampire", Weasel and Baboon as Friendly Neighborhood Vampires find themselves targeted by the local vampire hunter, Van Smellsing (the Red Guy), who is convinced that all vampires are evil monsters. In the end of the episode, Smellsing ends their feud after he gets turned into a vampire himself, courtesy of Weasel.
• Very Special Episode: Parodied in "I Are Good Salesman". It starts out as a cautionary tale against messing with fire (and selling it door-to-door), but trails off into Space Whale Aesop territory when Baboon starts selling canned earthquakes.
• Villain Decay: The Red Guy. In Cow and Chicken, despite his eccentricities, he was still a legitimate threat. In I Am Weasel, he was barely an annoyance and his schemes were utterly pathetic and entirely pointless.
• Virtuous Bees: "I Bee Weasel" features Weasel and Baboon as worker bees, and our red-butt Baboon wants to do a honey dance like all the other bees, but it soon results in further problems.
• Vitriolic Best Buds: Following him Taking a level in Kindness, Baboon goes from constantly resentful and envious of Weasel to becoming on much more cordial terms with him, even if their personalities still clash from time to time.
• Vocal Dissonance: Short, shrimpy Weasel speaks with the dulcet, sophisticated tones of Michael Dorn.
• Voices Are Not Mental: "I. Architect" switches Weasel and Baboon's brains, so we get to hear Michael Dorn and Charlie Adler imitate each other's usual performance.
• When Trees Attack: "A Tree Story" has the trees attack mankind for destroying so many of them. Baboon's massive logging operation was the straw that broke the camel's back.
• White-Dwarf Starlet: In "I.R. Ghost", Talulah Bottoms (The Red Guy) thinks she's this, but in reality, she was a bit player who ruined takes with her Bad "Bad Acting" and going off-script.
• Whole-Plot Reference:
  • "The Fairy Godfather" is one to Cinderella with a small reference to The Godfather.
  • "I Are Robin Hood" is obviously a Robin Hood parody.
  • "I Am Franken-Weasel" is one to Frankenstein.
• Wild Take: One of the cliches featured in "I Am Cliched", Baboon gets this reaction when he sees a penny on the floor.
• Wipe That Smile Off Your Face: In "The Baboon's Paw", Baboon's hand becomes magical and he makes wishes with his hand. Near the end, Weasel gets fed up with the wishes he makes and wishes Baboon to shut up, and before Baboon can make another wish, his mouth disappears.
• World of Ham: Being a spin-off of Cow and Chicken, this is to be expected.
• Your Size May Vary: In "Enemy Camp" there are two◊ savage weasels◊ that attack Red Guy and they are much bigger and muscular compared to I.M. Weasel and Baboon◊. However, in the next scene◊, they're much smaller and roughly the same size as a regular weasel.