The Adventures of Jimmy Neutron: Boy Genius, often shortened to just Jimmy Neutron, was an American animated television series, and spin-off of the Academy Award nominated computer-animated movie, Jimmy Neutron: Boy Genius. It first officially aired on September 6, 2002, on Nickelodeon, and on September 6, 2004 on E4, which is owned by Channel 4, and is also the very first computer-animated Nicktoon. Jimmy Neutron, Spongebob Squarepants and Fairly OddParents were always nominated for "Best Cartoon" in the Nick Choice Awards
James Isaac "Jimmy" Neutron (Debi Derryberry) is the main protagonist of the show. He is an 11-year-old American boy with a stunning IQ and a love for science. Usually, his inventions cause more harm than benefit for the city of Retroville, 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. Throughout the series there are hints that he has feelings for Cindy Vortex. His middle name is named after Isaac Newton, a famous scientist.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's still has a few kinks to work out, but otherwise, this digital dog is the perfect (cyber) canine companion. Goddard is named after Robert Goddard, the "Father of Rocketry".
Carlton "Carl" Wheezer (Rob Paulsen) is Jimmy's shy, asthmatic right hand man. Carl is allergic to lots of things, including cats, turtles, and even lasers. Yet he still helps Jimmy with his experiments. He often tries to be "cool" like Jimmy.
Sheen Estevez (Jeff Garcia) is Jimmy's hyperactive but heroic friend. He is obsessed with Ultra Lord, a popular superhero action figure within the show. Sheen sometimes fails to grasp the reality of things and is very random at times. He lives with his father. Sheen's name probably comes from Martin Sheen, whose real surname is Estevez (Just like Charlie Sheen's birth name). Sheen shows that he may have feelings for Libby Folfax on several occasions.
Cynthia "Cindy" Vortex (Carolyn Lawrence) is Jimmy's sassy, independent, intellectual rival. She has a dog named "Humphrey" who she says is the best dog in Retroville. Her best friend is Libby Folfax. She also hints at having feelings for Jimmy.
Liberty "Libby" Folfax (Crystal Scales) is Cindy's best friend. She loves funk/hip-hop and electronic gadgets. Later on in the show, she received a brand-new hair makeover and a striped-pink shirt. Libby is 10, 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, though isn't at the level of Jimmy or Cindy in terms of intellect. She shows hints at having feelings for Sheen as well but it's never really clear whether she does or not.
Hugh Neutron (Mark DeCarlo) is Jimmy's dad. He is very obsessed with ducks and loves pie. He tries to spend as much time with Jimmy as possible and is very intrigued by his inventions. He is really goofy but loves his family, including his wife Judy who he often calls "Sugar Booger".
Judy Neutron (Megan Cavanagh) Judy is Jimmy's mom. She is loving and is the stereotypical 50's 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 his life and his adventures.
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