The Adventures of Jimmy Neutron: Boy Genius - Plot and Characters

Plot and Characters

James Isaac "Jimmy" Neutron (Debi Derryberry) is the main protagonist of the TV series. He is an 11-year-old suburban boy with a stunning IQ and a love for trees. He is at first 10, but turns 11 in "Hypno Birthday". Usually, his inventions cause more harm than benefit for the city of Retroville where most of the episodes a character with sub-normal intelligence misuses his inventions, but that never stops him from trying. Most of the time, he's busy saving the city from his own experiments gone wrong. He is best friends with Carl and Sheen. His middle name is named after Isaac Newton, the famous physicist. In the movie, Jimmy wore blue shorts and brown shoes. In the television show, he wears blue jeans and gray Converse sneakers.

Carlton Ulysses "Carl" Wheezer (Rob Paulsen) is Jimmy's shy, asthmatic best friend who has an unhealthy obsession with llamas and Jimmy's mom. Carl is allergic to lots of things, including cats, turtles and Sheen, yet he still helps Jimmy with his experiments. Carl is very overweight, and has red hair and glasses. He wears green jeans and a striped red and yellow shirt with a belt.

Cynthia Aurora "Cindy" Vortex (Carolyn Lawrence) is Jimmy's sassy, independent, intellectual rival, and later love interest. She has a dog named "Humphrey" who she says is the best dog in Retroville. Her best friend is Libby Folfax. In the movie Cindy is seen wearing a pink buttoned shirt, black jeans, pink shoes, and her hair styled in pigtails. This design of Cindy was used more often for Jimmy Neutron video games. Also in the mini short of Jimmy Neutron entitled Good Dog; Old Tricks, Cindy wears a pink dress. But in the TV show her hair is styled into a ponytail with a green halter top, khaki pants, and pink converse shoes.

Sheen Juarrera Estevez (Jeffrey Garcia) is Jimmy's hyperactive other best friend. He is obsessed with a comic book superhero, Ultra Lord. Sheen sometimes fails to grasp the reality of things. He lives with his father. Sheen's name comes from the Sheen acting family headed by Martin Sheen. He has a crush on Libby Folfax. He later becomes the main protagonist of the show's spin-off Planet Sheen.

Nicholas "Nick" Dean (Candi Milo) is the 'cool guy' that everybody loves at school, especially the girls. He isn't exactly the smartest guy, but he makes up for it with his looks; in some episodes he appears well-rounded. His main hobby is skateboarding, but he also likes singing German opera. He dresses like a greaser with gelled hair, denim and leather jackets, and slightly cuffed jeans. He is also prone to injury. In most of the episodes he's in, he usually ends up screaming "OW MY leg" and breaking it. He is seen with a broken leg in one episode, in which his leg is completely upside down, and in the episode, "Lady Sings the News", it is reported that he had broken his leg for the 15th time that year.

Liberty Danielle "Libby" Folfax (Crystal Scales) is Cindy's best friend. She loves funk/hip-hop/R&B and electronic gadgets. Later on in the show, she received a brand-new hair makeover and a striped-pink shirt. Libby is 11, and in the first season she does not appear on the title logo, however when she becomes more involved in the show in the second season, she is added to the logo. Unlike Jimmy's friends, Libby is shown to do well in school, but isn't at the level of Jimmy or Cindy in terms of intellect. In the movie and first half of the series Libby's hair is up in a bun, with a large bang covering her left eye. She wears a green dress, green socks, and black dress shoes. Later, in the episode "Beach Party Mummy", she got a makeover with her new cornarrow braids, pink shirt, blue jean pants, and brown shoes.

Judith "Judy" Neutron (Megan Cavanagh) is Jimmy's mother. She is loving and is the stereotypical 1950s housewife. Her style is also typical and her hair is in a distinctive cut, usually noticed in a few episodes. Of course, she loves her family and gives Jimmy advice about life and his adventures. Her husband "Hugh" refers to her as "Sugar Booger" or "Butter Biscuit", and he believes she makes the best pies, she was hypnotized four times throughout the series. She was once hypnotized into believing she was Mighty Mom and ran amok believing she was a superhero.

Hubert Beaumont "Hugh" Neutron (Mark DeCarlo) is Jimmy's father. He is really goofy but loves Jimmy and his wife who he often calls "Sugar Booger" or "Butter Biscuit". Hugh works at Mallard Motors as a car salesman. He is obsessed with ducks, and his favorite food is pie.

Goddard (Frank Welker) is Jimmy's trusty robotic dog. Considering he's made of sprockets, circuits and widgets, Goddard makes one great man's best friend. Plus, unlike his real-life canine cousins, Goddard can transform into a whole slew of useful tools, vehicles, and other gadgets for Jimmy. Goddard still has a few kinks to work out, but otherwise, this digital dog is the perfect (cyber) canine companion. One of Goddard's trademarks is "playing dead," in which he explodes, and then he automatically reassembles himself a few seconds later. Goddard is named after Robert H. Goddard, the "Father of Rocketry".