Jimmy Neutron

An early drawing of the character by Paul Claerhout with the original name

In the 1980s, Keith Alcorn and John A. Davis created the character when he was originally named, Johnny Quasar (inspired by a facetious nickname that his Summer co-workers had coined for him in his youth[1] who builds a rocket ship and runs away from his parents.[2] He later stumbled upon the idea while moving into a new house in the early 1990s. He re-worked it as a short film titled Johnny Quasar and presented it at SIGGRAPH, where he met Steve Oedekerk and worked on a television series of the short as well as the movie.In Fall 1995, the idea was pitched to Nickelodeon, who expressed immediate interest in the idea. Albie Hecht, the then-president of Nick, was particularly impressed- coining him to be "half Bart Simpson and half Albert Einstein," he strongly praised Johnny's blended personality as an adventurous and intelligent character and one grounded in the reality of childhood, which, according to him, made him "the perfect Nick kid."[3] Following positive reception, Nickelodeon commissioned for a 13-minute pilot episode to be created.[2] After several years of going through the review process, the episode began production in late 1997, and was completed in 1998. The name "Johnny Quasar" was changed at the request of Nickelodeon, who did not want the character to be confused with similarly-named ones such as Jonny Quest and Captain Quazar, so Davis brainstormed other character names while walking his dog around the neighborhood block, eventually coming up with the final name, "Jimmy Neutron."[4][5]

A young male of average height, Jimmy has brown hair gelled in a large cowlick, which has been easily mistaken for a soft serve ice cream cone, huge blue eyes, and a fair complexion. His apparel since the motion picture/series consists of a bright red T-shirt with a yellow atom graphic, sapphire blue jeans, and white sneakers. (originally shorts and brown shoes) Sometimes, on a few Season 1 episodes he takes hold of a black watch on his arm. Because of the aforementioned hairstyle, he has earned the following nicknames such as Whippy Dip from Cindy and Señor Fudge-Head from Cosmo as a 2D character.

An extremely intelligent genius with an intelligence quotient of 210, he is defined as one of smartest people in the town of Retroville. Throughout the series, as explained in the theme song, he is described being “a kid with a knack for inventions.” Despite this quote, said inventions may go haywire. Still being on that intellectual on a difficult situation, he had quick memory banks dubbed Brain Blasts. Lastly, because of these he is the manly man parallel to Carl’s sensitive guy while Sheen is the in-between.

Debi Derryberry provides the voice of Jimmy Neutron

Jimmy Neutron was played by female voice actor Debi Derryberry, who would continue to play the character in the TV series and flim. Derryberry's biggest acting role at the time, as previously she had mostly provided minor roles in films and TV shows. This is the second Nickelodeon character she voiced after Weenie from Oswald.