Nelson Muntz

Nelson Muntz is one of the most recurring antagonists in "The Simpsons" and acts as a rival of sorts to Bart Simpson, although the relationship between the two can vary - normally Nelson is Bart's enemy and one of the few bullies Bart actually fears.

Nelson also tends to act alone, unlike the other bullies of the show (Jimbo Jones, Dolph and Kearney) - he is also more openly hostile towards everyone in the town, while the other bullies tend to show some (limited) respect to the adults of the town.

Nelson likes to beat up on people who anger him (or just happen to be in his way) and is very well-known for mocking people with his now famous laugh - he laughs at others misfortune in almost every appearance he has in the show and has become so famous for this that it has become a recurring joke in the series.

Behind his tough-guy exterior however Nelson does have a softer side, which has been explored in some episodes, and has even become friends with Bart on rare occassions - however such friendships are shortlived and he tends to return to his bullying ways by the end of each episode.