Mr. Hankey, the Christmas Poo - S1-E10
Continuity mistake: When the town are protesting outside the Mayor's office, the woman at the front of the Nativity protesting group is wearing a purple shirt. A few seconds later, she is with the group against the cutting-down of Christmas trees wearing a completely different shirt (white with a Christmas tree in a red circle with a line through it).
Continuity mistake: When opening presents, the blue mega man disappears instantly. (00:18:20)
Continuity mistake: Halfway through the episode, Green Mega-Man turns into Blue Mega-Man.
Continuity mistake: When Mr. Garrison returns to the classroom with his new face and does the posing to "Shadow Dancing," it flashes back to the students and Wendy is dressed in her normal clothes instead of the black leather she wore to impress Stan. Next time it shows her, she's back to normal.
Continuity mistake: When Stan pukes on to the desk when Miss Ellen says his name at first, it is pink. Then when the camera cuts back to him, it is brown. Then when he pukes the second time and Kyle says "You had waffles for breakfast huh?" it is pink again.
Continuity mistake: While Kyle is asleep in his bedroom the Triangle of Zinthar is on the dresser beside the framed photo, but in the next shot when the cut ceiling falls onto the floor the Triangle has vanished, then it reappears on the dresser where it is supposed to be. (00:07:40)
Cartman's Mom is a Dirty Slut (1) - S1-E14
Continuity mistake: At first the football team is mentioned as "The 1989 Denver Broncos" but throughout this episode and its sequel, they are "The 1991 Denver Broncos."
Cartman's Mom is a Dirty Slut (1) - S1-E14
Continuity mistake: The video sent in by Stans granddad of Kenny getting hit by the train doesn't match what actually happened.
Cartman's Mom is a Dirty Slut (1) - S1-E14
Plot hole: Stan's grandad submits the video of Kenny being hit by the train. This gets through into the final, which shocks Stan and Kyle. But shortly the clip would have had to get through to the final by another episode, so shortly Stan and Kyle wouldn't have been so surprised. The video couldn't have been submitted before, as Stans video was submitted first.
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