Deliberate mistake: Game Over: When the large crowd of people are looking at the complete stairway to heaven, they are standing a large distance away from it. Then suddenly, the crowd is right in front of it. The crowd and the stairway are not shown in the same shot, but Lisa (who is standing in front of it) looks to the crowd and says "Come on everyone" and they proceed to run up along with her, so they are closer.
Continuity mistake: Game Over: When Marge says all they can do is pray that God saves us, Lisa (who is standing in front of Marge, but turned away), turns her body around 90°, and then turns her head to the right 90° so she is looking at Marge. When the shot cuts to Lisa, she is facing Marge directly.
Character mistake: Game Over: After returning from the Game Engine and Bart points out they are still under attack, Marge says "I guess all that's left to do is pray that God saves us." When she says this, Lisa can be seen smiling, but the town is still under alien invasion so there should be no reason to do so. She doesn't come up with the idea to use her Buddha Hand powers to talk to God until right after Marge says the line, so it couldn't have had anything to do with that.
Other mistake: Game Over: Once everyone returns from the Game Engine, Homer sits down on the couch. The house then rumbles, prompting Bart to walk over to the window and say "Homer, we're still under attack." When Bart says this, he looks over to the left side of the living room. But the window is in the centre of the room and the couch directly faces the window, so there is no way Bart could've been looking at the couch to say the line to Homer.
Continuity mistake: Game Over: When Bart points to the doors to get back to Springfield, we can see that there is a red carpet leading up to the doors. In the next shot, the red carpet is much narrower.
Continuity mistake: Game Over: When everyone is escaping the Game Engine, Mr Sparkle can be seen exiting the Big Super Happy Fun Game level. In one shot, he is a couple feet off the ground. But in the next shot, he is several meters in the air.
Other mistake: Game Over: Whilst the Game Engine is collapsing, there is a shot of the video game characters escaping their respective games, shown from on the ground, while the Simpsons toward the door back to Springfield. To the right, a character can be seen exiting the Big Super Happy Fun Game level, but the door behind him is closed.
Continuity mistake: Day of the Dolphin: When Lisa is telling Captain McAllister she's so sorry after he explained what happened, he says "Don't you dare pity me" and takes out his smoking pipe. When he takes it out, he has his index finger and middle finger holding onto the breathing tube. But in the next shot, the breathing tube is on top of his index finger.
Continuity mistake: Bartman Begins: When Bart is in the alley way and starts walking down the path leading to the main street, the building to his right has a window located a few inches to the edge of the wall. Seconds later, when Bart begins reading the manual, the window is much further away from the edge of the wall.
Continuity mistake: Bartman Begins: When Bart kneels down to pick up the Simpsons Game manual, there are heavy shadows cast on the wall beside him. In the next shot, the shadows are a lot thinner and there is more sunlight cast on the wall.
Continuity mistake: Bartman Begins: When the Simpsons Game manual lands in front of Bart, in the wide shot, his right foot is pointed to the right and his left foot is pointed to the left. When it cuts to a shot focusing on the manual, Bart's feet are pointed directly forwards.
Revealing mistake: Bartman Begins: When Bart is walking through the alleyway, complaining he only has the games he bought yesterday, he steps on top of a discarded wrapper, but wrapper is unaffected by getting stepped on by Bart's foot. It remains in the same position and is never shown bending.
Revealing mistake: Mob Rules: When Lisa is asking Marge if she finds it hypocritical that she is opposed violence in games, yet she used violence to get her way, the body movements used for the mob appear to be repeated and reused throughout the shot. Every time they are shown waving their arms, they appear to move in the exact same way.
Continuity mistake: Mob Rules: When Mayor Quimby tells the mob that is going to ban Grand Theft Scratchy for minors, they all begin cheering. When they do so, the senator can be seen standing next to Marge and Lisa. Marge and Lisa begin talking, and the senator has suddenly disappeared.
Other mistake: Mob Rules: When Quimby, the game producer and the two interns get out of the hot tub, no water can be seen dripping off their bodies and onto the floor.
Continuity mistake: Mob Rules: When the game producer shows Quimby the bag of money, his right hand changes position between shots.
Revealing mistake: Mob Rules: When Quimby tells the game producer he's ready to receive the bribe, the producer picks up a bag of money to show him and opens it. When he opens the bag, one of his fingers can be seen passing through the bag.
Continuity mistake: Mob Rules: When Quimby and the game producer are celebrating in the hot tub, in the first shot of them, the "MAYOR" sash is positioned so that the R is in the water. In the next shot, the sash is raised above the water.
Revealing mistake: Mob Rules: After Lisa sets the statue on fire, the scene cuts to inside Mayor Quimby's office where he and the game producer are shown sitting in a hot tub with steam coming from it. For the first frame of the shot, the steam coming from the tub doesn't appear to have been animated. The steam literally pops up on screen a few frames after the shot starts.
Continuity mistake: Mob Rules: Whilst Marge is reading the newspaper in the opening cutscene, take note of the queue outside the Sequel Stop store. In the opening shot, they are standing outside the door. Then two shots later, they have disappeared. Then they reappear two shots after that. A couple seconds later, after Martin drives away in Ned's car, they have changed position and are now seen standing on the curb.
