Continuity mistake: There is a scene where the FBI show up to the North American Marlon Brando Look Alikes meeting by mistake. However, during a close up of the leader's (the geneticist's) face, you can see the bottom of the banner actually says "Man Boy Love", as in the other NAMBLA. (00:16:20)
Continuity mistake: When Kenny approaches his mum with a plunger, she asks, "What are you doing Kenny?" and she is wearing a "I'm with Stupid" t-shirt, but when Kenny tries to plunge her, the phrase "God Bless America" can be seen visible on her T-Shirt.
Answer: He appears in at least 5 other episodes, but usually just as a background character. He can be seen at Cartman's party in "Immaginationland". He was also one of the kids trying out to replace Butters in the "Professor Chaos" episode.
Bishop73