Episode Title:Sheen's Brain.Episode Description:After Sheen fails a history test, Miss Fowl tells Sheen that he'll be left back unless he passed his math test. So Jimmy increases Sheen's brain to be larger and smarter. However, Sheen soon becomes evil and mad with power with his new supreme mental abilities, and proclaims himself king. Jimmy and Carl must stop Sheen from taking over Retroville, and the entire planet, by convincing him to drain his brain back to normal.