Conrad Mundy is a bad kid who according to Gretchen is the second worst kid at Third Street School. As a result of his bad behaviour he is a frequent visitor to Principal Prickly's office.
He is also banned from Aaron Kelso's local shop for stealing. In Season six's "Mundy, Mundy" he decides to become a better person and to do nice things. After he prevents a ball from hitting Cindy, Mundy becomes quite popular, much to his chargrin.
He was voiced by Warren Sroka.
Trivia
Conrad's appearence could be based off Lampwick from Disney's Pinnochio. Both are bucktoothed mischevious redheads.
Conrad is quite similar to Stuart Dooley from 'King of the Hill'.