Continuity mistake: Mob Rules: When Martin runs out of the video game store, there is a line of people queueing outside. A couple of seconds later, as Marge and Lisa watch Martin throw Ned out of his car, the video game store is visible in the background, and the queue has vanished.
Continuity mistake: Lisa the Tree Hugger: When Mr. Burns is talking to Smithers about his tree cutting plan, there is an overview shot where his right arm is near the edge of the mat on the table. The shot cuts to a closer shot of Burns and his arms are now near the middle of the mat.
Continuity mistake: Game Over: During the destruction of the game engine, there is an overview shot at the start of the cutscene, where the doors to the both the Big Super Happy Fun Fun Game level and NeverQuest are open. The shot cuts to an angle from the ground, and the doors to those same games are suddenly closed.
Continuity mistake: Around the World in 80 Bites: Before the race is about to start, as Comic Book Guy says "With great hunger comes great responsibility", Homer and Comic Book Guy are standing beside each other. Shot cuts, and the school bus driver, Otto has suddenly appeared in between Homer and Comic Book Guy.
Continuity mistake: Bartman Begins: When Homer sees Bart in his Bartman outfit, in the shot where Homer says "If you think on coming home like that, don't bother", Homer is standing beside a wall of a building. The shot cuts and Homer is suddenly standing in the middle of the road, with no such building in sight.
Continuity mistake: Bartman Begins: Whilst Bart is reading the Simpsons a Game manual, when the camera is facing the main road, there is a blue apartment building visible in the far background. When Homer appears in the scene seconds later, the same background is visible, but the apartment building is no longer there.
Continuity mistake: Bartman Begins: After Bart has transformed into Bartman, he is wearing gloves, but as he explains his superpowers to Homer, the gloves have vanished.
Continuity mistake: The Land of Chocolate: When Homer stops by the arrow to Fudgetown, the arrow is a few feet behind him. Next shot, the arrow is further away.
Continuity mistake: The Land of Chocolate: When the sky rains chocolate balls into Homer's hand, watch the background. In the far background, there is a large dollop of chocolate ice-cream, but when the shot cuts, there are now two and they are much smaller.
Continuity mistake: Game Over: When the Simpsons meet God, Lisa asks "You've been playing with our lives and we'd like you to stop." Bart and Lisa are standing mostly beside each other, but in the next shot, Bart is suddenly standing in front of Lisa.
Continuity mistake: Game Over: Back at the Simpson household, Homer asks what's for dinner, and a video game character resembling Mario hops onto the opposite side of the couch hoping it's spaghetti. After Bart points out that they're still under attack, the video game character has vanished from the couch.
Continuity mistake: Game Over: When the characters are running through the portal to Springfield, the doors to the portal have circular windows in them. In the next show, just before Moe holds onto the light fixture above the portal door, one of the circular windows in the doors is suddenly cracked.
Continuity mistake: Medal of Homer: When Abe tells Homer and Bart to take care of the flags, Burns is standing next to Homer and Bart. Bart then asks what war is this and Burns has suddenly vanished.
Continuity mistake: NeverQuest: When Todd Flanders tells Homer and Marge the door is magic, Ralph and Rod Flanders are standing beside Homer and Marge. Homer then walks over to the door and Ralph is suddenly standing closer to Todd.
Continuity mistake: Bargain Bin: As the Simpsons are sitting on the couch, whilst Bart is looking up the Simpsons Game, Marge and Lisa are next to each other, but as Marge asks "what does it say we have to do next?", there is no sign of Lisa.
Deliberate mistake: Enter The Cheatrix: Any time in this level that shows one player jump into a pipe, the next scene shows two players exiting the pipe at the same time.
Other mistake: Shadow of the Colossal Donut: Homer and Bart's main and only objective in this level is to open each of the three hatches inside Lard Lad and rip out the circuits inside him. To open the hatch, Bart will need to launch a slingshot at Lard Lad's hatches. After the hatch is opened, and the circuits have been ripped out, the hatch will always vanish completely.
Continuity mistake: Bargain Bin: As soon as the level starts, Marge, Lisa and Maggie vanish from next to Homer and Bart.
Continuity mistake: Bargain Bin: When the Simpsons arrive in the Game Engine, they keep switching from all even with each other to Bart and Lisa standing in front of Homer and Marge.
Continuity mistake: Bargain Bin: Throughout the opening cutscene inside the Game Engine, all five Simpsons are shown together, but in the shot where Bart says "And poorly rendered" and Marge says "Which one is supposed to be me?", Lisa has vanished and reappears in the next shot.
