Martin

"I appreciate the opportunity to be tapped by you."

- Martin's unlock message.

Martin Prince is the second kid to be unlocked in the game, following Milhouse Van Houten. He is unlocked upon completion of Springfield Library.

Simpsons Wiki Description
Martin Prince, Jr. is Bart's classmate, and is Lisa's rival in intelligence. He is Nelson Muntz's favorite target for bullying, except for Milhouse. He is an academically brilliant teacher's pet, and is portrayed as a stereotypical nerd. Martin Prince is a 4th grade student at Springfield Elementary School. He is sometimes shown as Bart's friend due to the fact that he is occasionally seen with Bart, along with Nelson and Milhouse, though the fact remains that Bart still taunts him.


 * Read the full article here at Simpsons Wiki