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Carl Wheezer

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Carl Wheezer

Gender Male
Hair Color Red
Relationship Judy Neutron (one-sided)
Elke Elkberg ("Carl Wheezer, Boy Genius")
Family Ebenezer Wheezer (dad)
Martha Wheezer (mom)
Friends Jimmy Neutron, Goddard, Sheen Estevez, Libby Folfax, Cindy Vortex, Nick Dean, Bolbi Stroganovsky, Zix, Travoltron, and Tee
Enemies King Goobot V, Ooblar, Professor Calamitous, Beautiful Gorgeous, Eustace Strych, Dr. Moist, Meldar Prime, Butch Pakovski, Baby Eddie, Grandma Taters
Likes Llamas, Judy Neutron, messing with Hugh Neutron, food
Dislikes Germs, lima beans, scary stories, spiders, Hugh Neutron, testing Jimmy's experiments
First Appearance Runaway Rocketboy!
Voice Actor Rob Paulsen

"Baby-Faced" Carlton Ulysses "Carl" Wheezer is a main character in the Jimmy Neutron franchise. He is one of Jimmy's best friends and a member of Team Neutron


Carl likes to eat, and this caused him to be overweight. When his parents expanded their cable line-up, Carl found himself focusing on a channel devoted to llamas and a show about a superhero called Llama Boy the Super Hero. He has adored llamas ever since, going so far as to join a fan club, the Llama Love Society (Which he likely created as he is shown to be the first member). He once turned into a llama. He is allergic to almost everything. Carl is also the one who unknowingly gives Jimmy his brilliant ideas. 

It is revealed in "The Incredible Shrinking Town" that he took ventriloquist lessons, and that he can virtually imitate and sound just like everyone. It is also a hinted that he has some sort of dislike for Sheen, even though he's one of his best friends. Carl enjoys playing a video game called Llamapalooza. It is also revealed in two episodes that he actually is envious of Jimmy and wants his life.

It was stated by himself that he as always wanted to touch a Llama in the movie.

Evil Side

  • In Carl Wheezer, Boy Genius, he was the main antagonist; he betrays Jimmy and starts verbally abusing him, even after the many times Jimmy saves his life. When Jimmy saves Carl for the third time, Carl blames Jimmy for everything (even though he was highly responsible) and pins all his insecurities on Jimmy. Carl doesn't even apologize to Jimmy.
  • In Stranded, he secretly hoards food, while his friends are starving. 
  • In I Dream of Jimmy, he secretly dreams of Jimmy being his servant and puts him through some torture. It is also revealed he wants Jimmy's life. 


Carl has peach skin and many freckles. He has a pair of small black eyes and red hair. He often wears an orange-and-red striped shirt, a pair of green pants (shown with suspenders in the movie and shorts), a pair of brown loafers, and glasses. Carl has also been left in his underwear on numerous occasions. Carl is shown to wear a nice pair of briefs.

In the pilot, his glasses were bigger, he wore a plain shirt, had a different hairstyle, a larger nose and wore green overalls. 



Carl has appeared in every episode of Jimmy Neutron along with Jimmy and Sheen. His first appearance was in Runaway Rocketboy!. His last appearance was in the series finale, Lady Sings the News.

He also a cameo in the spin-off series; Planet Sheen, during Sheen's flashback of him and Carl in the episode Is This Cute? when comparing similarities between him and Doppy.



Carl Wheezer image gallery

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