Cartman Gets an Anal Probe - S1-E2
Continuity mistake: In the classroom there is a poster of The Laughing Cavalier in the back wall in the class. In the last shot of that scene you can notice that the poster has disappeared and is replaced with an astronaut poster. (00:09:05)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: Mr.Garrison's glasses change throughout shots, from a thin pair to a bold pair.
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: The stars keep changing position (especially the sparkly big one) when Cartman is tied to the tree. (00:18:05)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: In the classroom scene where Kyle tries to be excused from class to find Ike, Cartman sets Pip on fire as he was sitting just behind him to the the left. However in the previous shots Pip had not been sitting there, some other kid was and wouldn't have had enough time between shots to move. (00:09:05)
Continuity mistake: When we see Kenny from the front, the hole in his head exposing his brain appears on his left side, but when we see the top of his head when he is biting people, the hole is in the back of his head.
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: After Stan vomits from Wendy talking to him at school, the vomit disappears in a few shots. (00:10:55)
Cartman Gets an Anal Probe - S1-E2
Continuity mistake: When the boys are first seen in the cafeteria, Stan is in front of Cartman. When Kyle says, "Hey look, there's Wendy Testeburger." in the next shot, Stan is now behind Cartman. (00:10:05)
An Elephant Makes Love to a Pig - S1-E6
Continuity mistake: When the boys are standing in a group, Kenny disappears after a while, then Stan disappears, but then a second later, they are all back together.
Continuity mistake: After Mr Garrison announces Kathie-Lee will be presenting an award for Cartman, you see the next scene in the Mayors office. There we can see cleary the curtains are red, then she looks out the window and looking in the office from outside, they are pink, but it goes in the office again and now they are back to red.
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.
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.
Continuity mistake: Just before Warsog emerges from the network building for the first time, Mrs. Marsh is shown to be stood next to a couple of random townspeople. In the very next shot Mrs. Cartman, Mrs. Broflovski and a third nondescript have appeared.
Pilot: The Spirit of Christmas (Jesus vs. Santa) - S1-E1
Continuity mistake: When Santa Claus is spinning Jesus over him, Jesus' beard keeps appearing and disappearing.
Continuity mistake: In one shot, the security guards are on the ground surrounding Kathie Lee, and in the next shot, they are on the truck.
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 Mr. Garrison is standing in front of the mirrors with the gun, his hand's position on the gun differs depending on what mirror you're looking at.
Mr. Hankey, the Christmas Poo - S1-E10
Continuity mistake: In the scene where Mr. Garrison is telling the students to to get in place for the play, Kenny is seen in the group. Despite the fact that he is supposed to be taking the star or the ceiling at that point. He is then seen seconds later climbing down the ladder with the star.
Continuity mistake: When Mr. Garrison is carrying around his gun, it is not the wood finished gun with the wood colored hand grip that he bought, it was the other one that had the grey hand grip. (00:14:20)
Suggested correction: He says he will have it (wood finish) then it shows him walking through town. Plenty of time for him to change his mind again.
Perhaps, but later when Stan and Wendy interrupt him, his gun exhibits wood furniture again. Unless he purchased both, some error has been made here.
Continuity mistake: Halfway through the episode, Green Mega-Man turns into Blue Mega-Man.