Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Continuity mistake: When Cartman goes to see the mall manager for the second time, the doors close behind him. Two shots later, the doors are suddenly open, then go back to closed two more shots later. (00:13:10)
Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Audio problem: After the first group of people run to buy an orange smoothie, when the security guard says, "Jesus, they're gonna start a riot," his mouth never lip-syncs the word "riot." (00:08:28)
Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Continuity mistake: When the Marsh family is having dinner, Stan's cup and knife repeatedly vanish and reappear between shots. Shelley's cup and knife also vanish in her close-up. (00:02:50 - 00:03:14)
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