Continuity mistake: When Mr Mackey is talking to the class, the sign above the blackboard starts at B in the close up shots, but A in the long shots. (00:01:30)
Other mistake: In this episode we see Britney in the hospital and there is a chart on the end of her bed. However the chart is identical to the one that was on the end of Cartman's bed in the previous episode. (00:07:50)
Continuity mistake: The way Kyle holds the Xbox 360 changes between shots. In one shot the green circle is in his left hand, but from the side, the green circle is in his right hand. (00:13:20)
Continuity mistake: When the teachers and doctors are saying to Stan, Kyle and Butters that Eric has AIDS, Kyle holds his hands up and says "hang on." Camera cuts and his hands are at his side. (00:04:15)
Casa Bonita - S7-E11
Continuity mistake: When Cartman is trying to convince Butters that a meteor is heading to earth, Cartman jumps on a Terrance and Philip chair when dangling the rock in front of the telescope. The letters T and P on the chair are pretty much across from each other and above Terrance and Philip's head before and after Cartman gets on/gets off the chair. When Cartman is doing his calculations in the next shot, the letters T and P on the chair are now in a different position on the chair and if you look under the letters you can also see that Terrance and Philip's head have also changed positions.
Continuity mistake: When opening presents, the blue mega man disappears instantly. (00:18:20)
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)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: When at Stark's pond, the vomit by Stan's feet disappears. (00:16:00)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: The rock Kyle throws at the alien ship appears from nowhere. (00:14:00)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: On the bus, we see there is a shot of the bus with 4 kids visible on the left hand side. However, when Ms. Crabtree swerves, a 5th kid with black hair appears out of thin air. (00:06:50)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: When Cartman is saying how the others are trying to scare him, you can see Kyle is not stood next to him. Camera cuts and now Kyle is there. (00:04:20)
Cartman Gets an Anal Probe - S1-E2
Revealing mistake: When Chef is waiting for the visitors, he lifts his sunglasses. When he does, he blinks. But his eyes appear over the sunglasses. (00:19:25)
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