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: There is a scene where the FBI show up to the North American Marlon Brando Look Alikes meeting by mistake. However, during a close up of the leader's (the geneticist's) face, you can see the bottom of the banner actually says "Man Boy Love", as in the other NAMBLA. (00:16:20)
Continuity mistake: When Stan Kyle and Kenny are playing a board game, Kenny has one hand on his face and one on the floor. Camera cuts and now he has both hands on his face. (00:06:10)
Continuity mistake: When they shoot the monkeys dead, the one on the viewer's left head tilts down with his chin to his right. In the immediate next shot, his chin is to his left.
ManBearPig - S10-E6
Continuity mistake: In the first scene when Mr Mackey is introducing Al Gore to the school for his talk on ManBearPig, shots in the background show him standing in the audience while he is giving the introduction.
Continuity mistake: When Michael Jackson returns to Purgatory, keep an eye on Patrick Swayze. He is shown sitting on the left hand side of the front row. His clothes change from the black shirt and pants he wore in Dirty Dancing to a black fleece with a grey shirt and lighter grey pants. This clothing change occurs multiple times throughout the scene. (00:21:05)
Mr. Garrison's Fancy New Vagina - S9-E1
Continuity mistake: In the scene where we first see Kyle as a tall black kid, when Kyle's dad says " Come on Kyle we have to get going" And Kyle says "Alright dad", when kyle runs to his dad, we see his basketball jersey change from an orange 4 jersey to a blue "all state 4 Colorado" jersey. (00:14:20)
Continuity mistake: During the rehearsal of the play, Kenny's Indian feather is blue. When the tepee crushes him, his feather is now yellow.
Cartmanland - S5-E6
Continuity mistake: At the end, the IRS takes half of Eric's money in their hands. Next shot, a load more money has appeared on Eric's truck. (00:20:00)
An Elephant Makes Love to a Pig - S1-E6
Continuity mistake: Shelly throws Stan on the carpet, but then in the closeup, something blue appears under him. (Despite a deleted scene, this is still a mistake within the show.)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: The "School Food Is Good Food" poster in the cafeteria changes fonts between shots. (00:10:50)
Butters' Very Own Episode - S5-E14
Continuity mistake: When we view Butters from the front of the car, the clip of his seatbelt is above the seat, but when the shot changes to a closeup of Butters, the clip is below the top of the seat. (00:07:55)
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: 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)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: When Cartman accidentally sets Fluffy the Cat on fire, it jumps up into the air and knocks over a picture and it falls onto the floor. When Stan, Kyle, Cartman's mom and Wendy walk into the living room in the next shot, the picture has disappeared. (00:17:45)
Continuity mistake: When Wendy finds her report paper, it has "good effort" and her grade written in red marker pen on it, with a short note underneath it also written in red pen. In the next shot the "good effort" and grade number are still on the paper but the note underneath has vanished.
Continuity mistake: When Cartman throws a tantrum and makes his Mum go to the store to get him Weight Gain 4000, he throws his Cheesy Poof's bag to the floor. In the next shot it's in his hand again.
With Apologies to Jesse Jackson - S11-E1
Continuity mistake: Driving home from the game show, the road behind Randy's car doesn't have white lines as shown in a previous shot. (00:02:20)
Continuity mistake: Butters can be seen in the classroom when Mr. Mackey shows up to deliver the message from Cartman's mom. Butters is still supposed to be at the conversion camp.
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."
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