Jimbo Jones, whose nickname is Corky, is a character who plays one of the prime bullies in the show. On numerous occasions, he and his henchmen buddies, Kearney and Dolph(sometimes Nelson), are seen beating up nerds, as well as Bart and obviously, they get away with it.
In the New Kid on The Block episode, Jimbo is revealed as Laura Powers' boyfriend, the girl Bart had a crush on. Bart then created a ploy which would show Jimbo's cowardly ways, and thus have Laura dump him. Jimbo's first appearance was in The Telltale Head episode, where Bart decapitated Jebediah Springfield's statue.
 Voiced By
Jimbo: (after Lisa defends Bart and disposes of the bullies herself) "It's a lucky coincidence you happen to be your sister's brother."