Merry Christmas Charlie Manson! - S2-E16
Continuity mistake: In the scene where the Cartman family and boys are seated at table, Kenny sits between Kyle and Great-Grandma. But a few shots later Kyle has to hold Great-Grandma's catheter bag, as he is now sitting next to her, and Kenny is no longer between them. However he's back between them again when the camera shows the whole table. (00:04:30)
City on the Edge of Forever (a.k.a. Flashbacks) - S2-E7
Continuity mistake: When the bus starts to rock, just after Cartman has recalled the Fonzie story, the background turns from day to night in a split second.
Continuity mistake: When the town has a Conjoined Twin Myslexia Parade, and Nurse Gollum is walking; you see her right hand down as she walks, and no people in the background. Then the shot changes, and you see her right hand up waving, and people where there weren't any before.
Cartman's Mom is Still a Dirty Slut (2) - S2-E2
Continuity mistake: Chef's car outside Hells Pass Hospital is almost covered in snow the first time it is seen. However a car seen sitting outside the America's Most Wanted studio in South Park a few minutes later has no snow on it whatsoever.
Spooky Fish - S2-E15
Continuity mistake: When normal Cartman goes up to Stan's aunt and is vibrating, Cartman is shown with the boys together, then proceeds to go back to them from his "new chair."
Merry Christmas Charlie Manson! - S2-E16
Continuity mistake: When Cartman tells Elvin that he finished his fudgesicle, the two are standing right next to each other. The shot then cuts to focus on Elvin crying, where Cartman cannot be seen next to him. A couple seconds later, when Cartman hits Elvin over the head, the two are right next to each other, but in the shot of Elvin, Cartman cannot be seen next to him.
Continuity mistake: The next day after Ike's bris Kenny is sitting in his seat in class but in the next shots of the class he is not there.
City on the Edge of Forever (a.k.a. Flashbacks) - S2-E7
Continuity mistake: After Cartman recalls the Fonzie story, and the bus starts to fall, Kenny is in the bus, but he was already killed by the monster. When the shot changes, Kenny disappears again.
Summer Sucks - S2-E8
Continuity mistake: When the boys stop to talk to Pip at the start they are stood on the tarmac. Camera cuts to the front and now they are stood on the grass. (00:03:00)
Chickenpox - S2-E10
Continuity mistake: When Cartman is scratching, his mum holds his hand. Camera cuts and he is back to scratching. (00:07:20)
Chickenpox - S2-E10
Continuity mistake: When the boys are walking to Kenny's house they don't have any sleeping bags in their hands. When they arrive they have sleeping bags. (00:03:45)
Summer Sucks - S2-E8
Continuity mistake: Mr. Garrison knocks his apple of the desk at the start. It reappears in the next shot. (00:02:00)
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