Sheen is Jimmy Neutron's other best friend. He is a hyperactive, lanky, dim-witted, 12 year-old Mexican American boy who is known for his obsession with UltraLord who stars in a television program that Sheen frequently watches (perhaps unsurprisingly, Sheen wrote the entire UltraLord website on the Internet). Sheen is also a fan of Speed Metal.Sheen's hyperactive personality boils over at times, often making him scare Carl.He is also best friends with Carl.In Operation: Rescue Jet Fusion , Sheen states that he is Mexican. It's possible that Sheen Estevez's name is a play on the name of Charlie Sheen, whose real name is Carlos Estevez.Besides having a loud voice, Sheen is older than most of his classmates, but it's not because Sheen was held back a year, but because his father made him start kindergarten a year late because he was shy as a young child. Sheen's mother passed away when he was very young, and has never appeared in the series before. Sheen also has an unseen younger sister, but she was only mentioned in I Dream Of Jimmy when she argued with Sheen about the possible existence of the Potty Fairy. Sheen also has an ongoing crush on Libby Folfax, and at the beginning of the series, she constantly taunted and rejected Sheen just how Cindy was with Jimmy before their romance blossomed. Towards the end of the series, however, Libby agreed to be Sheen's girlfriend, which gave him the strength to fight an enemy in one episode.Of all the characters on Jimmy Neutron , Sheen acts the oddest. In one episode, he is the only person who continually ate the, literally-shocking, candy that Jimmy invented and in two others (though throughout the series he has a liking to be shocked by anything electrical), when it seems the Earth will be destroyed, Sheen is only interested in winning a contest and becomes upset when he realizes the monster truck rally will be held the day after doomsday.He appears as the main character in Planet Sheen , a spin-off series which features Sheen as the main character. Show less «