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)
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 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)
Continuity mistake: When the Broflovski doorbell rings Gerald opens the front door and there's only a door knob on the exterior side of the door, but when Randy steps inside the house a backplate has suddenly appeared behind the door knob. (00:02:10)
Continuity mistake: When Randy is talking to Gerald at the start, Sheila walks over and is stood in front of Gerald. Camera cuts and now they are side by side, before Randy walks in. (00:02:20)
Continuity mistake: When the Marsh family show up at the Broflovskis in a panic, the front door's exterior door knob is at the left side of the door, but when both families decide to go to Starbucks the front door of the house opens the opposite way. (00:02:55)
Continuity mistake: When Sharon gives Shelley, Stan and Marvin a ticket, Shelley's ticket has the number 975, but in the next shot, the ticket now has the number 923. (00:13:45)
Continuity mistake: When Randy breaks into the trailer that has access to internet, the locked front door has a large "Red Cross Only" sign attached to the exterior side of the door, but when the guards unlock that door the large sign vanishes between shots. (00:18:20)
Continuity mistake: When Cartman puts the bag down when outside the Chinese place, the bag moves closer to the grass between shots. (00:06:00)
Continuity mistake: When Cartman is freaking out in P.F. Chengs, we see him from Butters' view across the table, and the red bottle with a label on is facing the camera/Butters. When the camera changes to the side, the bottle also changes with no-one touching it as the bottle is now facing the side. (00:07:30)
Continuity mistake: S12, E14 'Ungroundable': When Butters enters the computer room at the start, he approaches from the screen right. Camera cuts to the doorway and now he appears from screen left. (00:01:25)
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