Title: Nelson Muntz
Content:  The Simpsons creator Matt Groening named Nelson after the wrestling hold of the same name. Cast member Nancy Cartwright voices the character, which first appeared in the fifth episode of the first season, "Bart the General" (1990). American voice actress Dana Hill was first supposed to provide Nelson's voice, and attended the read-through of the episode. However, as Cartwright wrote in her autobiography My Life as a 10-Year-Old Boy, "the producers were still putting together this ensemble of [actors] and, come Monday, at the recording, she was nowhere to be found and the part was assigned to me. I didn't have time to ask why and I still don't have a clue." 
Title: Nelson Muntz
Content:  Lisa Simpson had already been around for a while, but this was the first time that the staff worked it into the show. Cartwright said in 2012 that she thinks Nelson "has evolved the most out of all the characters I do. There's a soft spot in him that the writers have found. He's got this special attraction to Marge, and he sings these songs, and he's got a crush on Lisa. There's something about this poor kid – his mother works at Hooters, his dad went out to buy cigarettes and never came back. I wouldn't want him to come over for dinner, but I really love doing his voice."
Title: Nelson Muntz
Content:  also commented that when she first found out she would be voicing Nelson, "I asked myself, 'What does a bully sound like?' Well... what you hear is what you get. When I first uttered, 'I'll get you after school, man!' I let out a sigh of relief when I got through the line and a double-sigh when it got a laugh." By the eighth season of The Simpsons, the writers had begun to explore the secondary characters of the show. "Lisa's Date with Density" (season eight, 1996) was the first episode to center around Nelson and was used to explain why he acts the way he does. The idea of Nelson 
Title: Nelson Muntz
Content:  Nelson Mandela Muntz is a fictional character and the lead school bully from the animated television series The Simpsons, best known for his signature mocking laugh "Ha-ha!". He is voiced by Nancy Cartwright and was introduced in Season 1's "Bart the General" as an antagonist, but later became more of an anti-hero.
Title: Frank Nelson (actor)
Content:  His distinctive appearance and manner of saying "yes?" has been parodied frequently in film, radio and television, most notably with the character on The Simpsons called the "Frank Nelson Type" (aka "Yes Guy"). Nelson's appearance and mannerisms were also parodied multiple times in the Disney Afternoon series TaleSpin, with Nelson represented by a large hippopotamus in a suit. The Daily Show often featured a Nelson impression by host Jon Stewart after a setup clip, often "Yeeesss?" or "Go onnnnnnn ..." followed by another clip which serves as the punchline. He was also parodied in the Merrie Melodies cartoon "Canary Row".
Title: Jimmy Nelson (ventriloquist)
Content:  In 1950, Nelson was hired as a regular on the Texaco Star Theatre TV show hosted by Milton Berle. Nelson and Danny O'Day would appear in Texaco gas jockey uniforms. At one point, he added another animal dummy to his character repertoire, a cat named Ftatateeta after a character in George Bernard Shaw's play Caesar and Cleopatra. The cat's voice was based on Ed Wynn's. In 1954, Nelson served as emcee on the game shows Bank on the Stars and Come Closer. In 1960, he hosted a 30 minute local TV show in New York titled "Studio 99-1/2" on WNTA-TV, channel 13. The show, complete with a cast of hand puppets and dummies all voiced by Nelson, generated the release of two children's LP's on Cricket Records, "Pinocchio" and "Peter and the Wolf".
Title: Mike Nelson (character)
Content:  in the films. Nelson's first full appearance was episode 513, The Brain That Wouldn't Die. He typically wore either a dark green jumpsuit, a teal jumpsuit or a blue jumpsuit. Series creator Joel Hodgson chose Nelson personally as his replacement, on the grounds that Nelson was a natural leader, a gifted comic and that he simply looked good standing next to the show's puppets. Prior to his tenure as host, Nelson played various parody "guest star" characters such as Torgo from Manos: The Hands of Fate, Morrissey, body builder and Hercules star Steve Reeves among others. He continued to play the occasional side character even after he became host. He also occasionally appeared as "Jack Perkins," and continued the persona as host of the syndicated Mystery Science Theater Hour.
Title: The Simpsons
Content:  The Simpsons has six main cast members: Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, and Harry Shearer. Castellaneta voices Homer Simpson, Grampa Simpson, Krusty the Clown, Groundskeeper Willie, Mayor Quimby, Barney Gumble, and other adult, male characters. Julie Kavner voices Marge Simpson and Patty and Selma, as well as several minor characters. Castellaneta and Kavner had been a part of The Tracey Ullman Show cast and were given the parts so that new actors would not be needed. Cartwright voices Bart Simpson, Nelson Muntz, Ralph Wiggum and other children. Smith, the voice of Lisa Simpson, is the only cast member 
Title: Bart Simpson
Content:  Bart's voice is provided by Nancy Cartwright, who voices several other child characters on The Simpsons, including Nelson Muntz, Ralph Wiggum, Todd Flanders, and Kearney. While the roles of Homer and Marge were given to Dan Castellaneta and Julie Kavner because they were already a part of The Tracey Ullman Show cast, the producers decided to hold casting for the roles of Bart and Lisa. Yeardley Smith had initially been asked to audition for the role of Bart, but casting director Bonita Pietila believed her voice was too high. Smith later recalled, "I always sounded too much like a girl. I read two lines as Bart 
Title: Nelson Muntz
Content:  home to rid himself of Nelson (who had been taken into the Simpson home by Marge). Nelson is also a natural athlete. In the episode "Bart Star", Nelson almost singlehandedly carries the entire Springfield Pee-Wee football team. As the team quarterback, he also on one occasion catches his own pass and plows through the opposing team with extreme ease. In various episodes, he gives out the impression that he is a lot smarter than he may first appear. Nelson often points out painfully obvious things to adults and kids alike that take them longer to grasp. Another example is a running joke where Nelson does a class assignment 

Question: who does the voice of nelson on simpsons?
Answer: Nancy Jean Cartwright.