Sheen Juarrera Estevez is one of the main characters from the Nickelodeon animated series The Adventures of Jimmy Neutron, Boy Genius. He is Jimmy Neutron's close friend who is obsessed with the television show UltraLord and, in the later half of the show's run, develops a crush on his classmate Libby Folfax. He would later star in his own spin-off series, Planet Sheen.
Appearances in Christmas specials
The Adventures of Jimmy Neutron, Boy Genius
In the show's Christmas episode, "Holly Jolly Jimmy", Sheen takes part in singing "Basking in the Warmth", and after the song is finished, he suggests they next sing about Arbor Day. When Jimmy explains that he doesn't believe in Santa Claus because he didn't get the core sample of a dwarf star two years ago, Sheen believes it was because Jimmy was naughty that year. Jimmy brings Sheen and their friend Carl Wheezer with him to the North Pole to prove his point. After Jimmy accidentally scrambles Santa's atoms, Sheen assists him in delivering all of Santa's presents around the world. During their travels, Sheen tries to stop Carl from tossing an Ultralord toy to the house they're delivering it to. At the end of the episode, after Santa brings the boys home, Sheen finds that he got peace on Earth and a plasma cannon toy.
Other Christmas productions
A year prior to "Holly Jolly Jimmy", Sheen appeared in the Merry Nickmas short "Patrick the Snowman", which opens with him and his friends building a snowman that looks like Patrick Star. After Jimmy's Spoofinator 4000 brings Patrick to life, Sheen is annoyed by the starfish hogging his blanket.