Sheen Estevez

Ramon Guevera "Sheen" Estevez is one of Jimmy's closest friends and one of the main protagonists in the television series. He is also the major protagonist in Planet Sheen. Sheen's obsession with Ultra Lord is one of the running gags in the series. He is shown to have many Ultra Lord action figures, and knows a lot of the trivia from the show. His love for the superhero was noted in the original film, and was carried on throughout the course of the series.

Sheen is voiced by comedian Jeff Garcia.

Jimmy Neutron
Sheen is the tetartagonist of the movie and the dueteragonist of the series.

He is a big Ultra Lord fan.

He is the main protagonist in Planet Sheen. In the first 18 episodes of the UK Version of Planet Sheen, he has his blank flank. In the last 8 episodes, Sheen got a new shirt. In the USA's first episode, he has his blank flank. But in the last 25 episodes, he got his blank flank.

Similar Heroes

 * Adam Park, Carlos Vallerte, Rocky DeSantos, T.J. Johnson, Trip and Zack Taylor (Power Rangers)
 * Bobby Zimmeruski (A Goofy Movie)
 * Kuki Sanban and Wallabee Beetles (Codename: Kids Next Door)
 * Milhouse Van Houten (The Simpsons)
 * Pinkie Pie (My Little Pony: Friendship Is Magic)
 * Freddy (Barnyard) and Pip (Barnyard Series)
 * Prince Naveen (The Princess And The Frog)
 * Rodney J. Squirrel (Squirrel Boy)
 * Shaggy Rogers (Scooby-Doo)

Trivia

 * Sheen is 14 years old.
 * Sheen is of Mexican descent.
 * Sheen's obsession with Utlra Lord and having every piece of Ultra Lord merchandise is similar with Numbuh Three's obsession with Rainbow Monkeys.
 * Sheen's name (or nickname, though it gets used as his main name) and family name derive from the family of actor Martin Sheen, born Ramón Antonio Gerardo Estévez. There is arguably a resemblance between Sheen's basic design and Martin's sons, actors Charlie Sheen and Emilio Estevez.
 * Sheen's talking primate companion, Nesmith, is named for musician and video artist Michael Nesmith, a member of the 1960's band, The Monkees.
 * He turned into a Planet Hero when he accidentally flew into Space.