Nelson Muntz
Nelson Mandela Muntz is a fictional character
Fictional character
A character is the representation of a person in a narrative work of art . Derived from the ancient Greek word kharaktêr , the earliest use in English, in this sense, dates from the Restoration, although it became widely used after its appearance in Tom Jones in 1749. From this, the sense of...

 and bully from the animated TV series The Simpsons
The Simpsons
The Simpsons is an American animated sitcom created by Matt Groening for the Fox Broadcasting Company. The series is a satirical parody of a middle class American lifestyle epitomized by its family of the same name, which consists of Homer, Marge, Bart, Lisa and Maggie...

. He is voiced by Nancy Cartwright
Nancy Cartwright
Nancy Campbell Cartwright is an American film and television actress, comedian and voice artist. She is best known for her long-running role as Bart Simpson on the animated television series The Simpsons...

. Nelson was introduced in Season 1's "Bart the General
Bart the General
"Bart the General" is the fifth episode of The Simpsons first season, which premiered on the Fox network on February 4, 1990. The episode deals with Bart's troubles with the bully, Nelson Muntz. Bart chooses to go to war with Nelson uniting the neighborhood children against him...

" as a bully but later turned into a friend of Bart Simpson
Bart Simpson
Bartholomew JoJo "Bart" Simpson is a fictional main character in the animated television series The Simpsons and part of the Simpson family. He is voiced by actress Nancy Cartwright and first appeared on television in The Tracey Ullman Show short "Good Night" on April 19, 1987...

, who is best identified by his signature laugh ("HA-Haw!").
Nelson Muntz is a student and bully at Springfield Elementary School. He is known to have terrorized virtually everyone in Springfield
Springfield (The Simpsons)
Springfield is the fictional town in which the American animated sitcom The Simpsons is set. A mid-sized town in an undetermined state of the United States, Springfield acts as a complete universe in which characters can explore the issues faced by modern society. The geography of the town and its...

 at one point or another.