Continuity mistake: When Eric comes running over to talk to the other 3 boys about the handicapped competition, their toy trucks are quite far apart from each other, but when it cuts from Cartman and then back to the boys, Kyle's truck has moved all the way in front of Stan's truck.
Continuity mistake: When Ned, Jimbo and Kenny are out on the fishing boat they have a rocket attached to a rack. After firing the rocket the rack still remains, but in the next shot when they head for shore the rack is gone.
Cartman's Silly Hate Crime 2000 - S4-E2
Continuity mistake: In the scene where Cartman is crying for his mother, the tattoo on Romper Stomper's face disappears, then comes back in the next scene.
Osama Bin Laden Has Farty Pants - S5-E9
Continuity mistake: When Osama is video taping his message, Kenny is sitting on the left side chair but when you see the video on the news, Kenny is setting on the far right side next to the goat. The other characters except for the goat change places as well.
Cat Orgy (1) - S3-E7
Continuity mistake: When Shelley chucks Cartman into the wall for arguing with her, the wall cracks. But later on in some shots the cracks have gone.
Casa Bonita - S7-E11
Continuity mistake: When Cartman is about to jump from the cliff near the end, the cop comes in front of him and you see his hand as a pointing gun, but then in the next shot his hand is fist.
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)
Something Wall-Mart This Way Comes - S8-E9
Continuity mistake: Episode 9, Season 8. When the kids get to the Wallmart we see a crane putting the letter "W" to the "WALLMART" sign. Later we see the same shot where the crane does it again.
Continuity mistake: In the beginning when the boys come in to the living room, Kenny's brother and Stan's sister Shelley is standing next to him. When it cuts, as Stan's grandpa enters, they're gone.
Continuity mistake: At several points during the final scene, the microphone stand disappears and reappears on the stage.
The Succubus (a.k.a. Chef's Mama) - S3-E3
Continuity mistake: Kenny's head is completely smashed when he is attacked in the church during Chef's and the succubus' wedding, but it is whole again when Cartman brings it to the optometrist to get an eye transplant.
Mr. Hankey, the Christmas Poo - S1-E10
Continuity mistake: When Mr. Hankey is dancing around Kyle's bathroom there are some poo marks where Mr. Hankey never even touched.
Make Love, Not Warcraft - S10-E8
Continuity mistake: When Liane comes down after Eric says "Bathroom", you can see Cartman, and to the left, Stan. However, when the camera instantly changes to a side view, Stan is no longer there.
Worldwide Recorder Concert - S3-E17
Continuity mistake: In the episode with the recorder concert. When Cartman and Kenny come into the hotel room, saying that they've found the "brown noise", Cartman is wearing headphones and holding another pair in his hand. Then he suddenly has two extra pairs - he gives one to Kyle and one to Stan (and is still wearing one himself).
Continuity mistake: Whenever you see Mr. Mackey, he has nothing connecting his glasses in the shots showing the front of his face. But in the side of his face shots, you can see he does have a connector.
Continuity mistake: When the boys are heading to see the quintuplets they approach a souvenir stand. In the wide shot all we can see are some CDs on the stand. In the close-up shot there are suddenly prize signs next to the CDs.
Two Guys Naked in a Hot Tub (2) (a.k.a. Melvins (2)) - S3-E8
Continuity mistake: In the scene where the ATF fires at the group of people coming out of Mr. Mackey's party, they drop dead. A few shots later when the ATF aims the big gun at the door, the bodies and bullet holes in the house are gone. (00:18:40)
Cat Orgy (1) - S3-E7
Continuity mistake: Just before Cartman sends his kitty out of the window with the photo, there's a photo frame on his desk and a "Cartman" cutout tacked above the desk, and on his bed is his frog toy and his hat. When Cartman walks over to the window with the kitty, all these items have vanished.
Cartman's Silly Hate Crime 2000 - S4-E2
Continuity mistake: In Mackey's office, Cartman goes from getting off his chair, then sitting back on the chair, then he appears back off the 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