Nelson Muntz

"Haw-haw!"

- Nelson's main quote Nelson Muntz is Bart's friend and also rival and the tertiary antagonist in The Simpsons series, but acts as a rival of sorts to Bart Simpson and is one of two main antagonists to Bart, 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 occasions - however such friendships are short-lived and he tends to return to his bullying ways by the end of each episode. Lisa has shown to continue having a crush on him and vice versa on occasions.

Trivia

 * In the 2007 theatrical movie is the quaternary antagonist turned anti-hero.
 * In the episode "The Simpsons Guy" he is the main antagonist and also the tertiary antagonist from Season 13 of TV Series "Family Guy", where he was tortured by Stewie Griffin. But this appearance is considered non-canon.