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.
Other mistake: Bargain Bin: Homer pushes Bart away from the computer so that he can play solitaire. He presses a button to open the DVD player, but the button is never shown pushing downwards. It remains in a fixed position when he presses it.
Other mistake: Big Super Happy Fun Fun Game: After the level has been completed and the village is made clean again, Milhouse begins to shrink back down from his Mr Dirt form to his human form. In the shot of him beginning to shrink, after his royal gear fades away, his eyebrows are temporarily missing.
Revealing mistake: Big Super Happy Fun Fun Game: When Mr Sparkle is telling Homer and Lisa that he must return to his corporation, in the shot of him saying "Cel soy kills the hunger demon", Lisa can be seen positioned on top of one of the coin slots without falling into it, revealing an animation error where it appears she is hovering above it.
Continuity mistake: Big Super Happy Fun Fun Game: When Lisa asks Mr Sparkle how he would describe the evil CEO's attitude, Lisa's head is level with Homer's wrist. When the shot cuts to focus on Mr Sparkle, her head is almost level with Homer's shoulder.
Revealing mistake: Big Super Happy Fun Fun Game: When Mr Sparkle says "Most disrespectful", part of Lisa's hair can be seen passing over Homer's arm. The edge of her hair has been cut off to make it appear as if it has been obscured by Homer's arm, but since the hair can be seen passing over Homer's arm, then this is an animation mistake.
Continuity mistake: Big Super Happy Fun Fun Game: In the opening cutscene, when Milhouse says "But I'm so huge", his shadow can be seen cast over the ground in front of him. This shadow cannot be seen in any other shot of the cutscene.
Continuity mistake: Invasion of the Yokel Snatchers: When the aliens have the security guard beamed up to their ship, they are shown standing on a lighted area. They continue to stand in the same area without moving, but when Cletus confronts them a few seconds later, they are suddenly standing on a shadowed area.
Continuity mistake: Invasion of the Yokel Snatchers: When Cletus confronts the aliens, the blue building on his right changes appearance between shots.
Continuity mistake: Invasion of the Yokel Snatchers: When the aliens lower a blue beam to take security guard up to the ship, in the shot of the beam being lowered, one alien can be seen standing next to the guard and another standing several meters away. In the next shot, the second alien is standing right next to the security guard.
Continuity mistake: Invasion of the Yokel Snatchers: In the establishing shot of the opening cutscene, to the right of shot, three bush plants can be seen in between the mall and the blue building next to it. A couple of seconds later, there is only one bush plant.
Continuity mistake: Invasion of the Yokel Snatchers: When Homer and Bart are watching the citizens get sucked up, additional cracks on the ground in front of them suddenly appear in between shots.
Continuity mistake: Bartman Begins: Whilst Bart is reading The Simpsons Game manual, the shot is panning around him. In the background, there is a lamp post visible on the corner of the street. When Homer enters the scene later on, the lamp post has changed design.
Continuity mistake: Invasion of the Yokel Snatchers: Whilst Homer and Bart are watching the citizens being taken into the spaceship and Homer is asking where mall security is, there is a water fountain visible in the far background, and there is no-one standing next to it. The shot then cuts to the water fountain, where an alien is now beside it.
Continuity mistake: Bargain Bin: When the mothership flies over the Simpson house, Bart says this must be the level boss for this part of the game, at which point Homer puts on a pair of glasses to look busy. The mothership then starts firing on them and the family start running. When the shot cuts back to them after being fired at, the glasses Homer was wearing have disappeared.
Continuity mistake: Big Super Happy Fun Fun Game: When Homer and Lisa are talking with Milhouse in the opening cutscene, Homer and Lisa are standing on the ground about a few feet away from the ocean, but in the shot where Milhouse says "But I'm so huge", Homer and Lisa are suddenly a much further distance from the ocean.
Continuity mistake: Big Super Happy Fun Fun Game: When Homer says to Milhouse "Hey, the girl said she's not interested. Beat it loser", Lisa is standing next to Homer, slightly behind him, but in the next shot, Lisa is suddenly standing slightly in front of Homer.
Continuity mistake: Big Super Happy Fun Fun Game: In the opening shot of the ending cutscene, an overview shot is of Homer and Lisa standing in front of the huge toilet. They are standing in some mud in the overview angle, but when the shot cuts to a closet angle, they are suddenly standing on the ground, away from the mud.
Continuity mistake: Big Super Happy Fun Fun Game: When Homer and Lisa insert the three Sparklemon into the coin slots, Mr. Sparkle rises and the area where Homer and Lisa are standing and where the coin slots are located can be seen in the shot of Mr. Sparkle rising out of the giant toilet. They are seen standing on the left hand side of the giant toilet, but when Mr. Sparkle "cleans" the village, the giant toilet can be seen in shot, but Homer and Lisa are nowhere in sight.
