Continuity mistake: Madame Blueberry's hair changes from brown to blonde throughout the film.
Suggested correction: Her hairstyle and hat change. She bought a wig and a new hat while at StuffMart, and continues wearing them until the final scene, where she is back to being herself.
Continuity mistake: When the girl in the orange slides over the stones and then falls to the ground tumbling over and over, you can see that her arms are completely protected by black arm protectors, yet when she comes to a complete stop, they are now missing.
Continuity mistake: Jake is opening Ian's locker, with Ian inside. He asks the third number of the combination; depending on the shot, he's holding the lock with both hands, or he has one hand on the door itself. (00:03:10)
Continuity mistake: When Thang and Rose approach Sal after searching the tunnels, the wide shot shows a large purple mushroom behind him to his left. Later on in the scene, after Gigi leaves, Thang tells him he's gotta be more careful, and it has disappeared. (00:08:25 - 00:09:25)
Continuity mistake: When the two cats move past the yawning rat to go up the crane lifter, the door is shut, but they slip into its semi-opened door when they reach the platform in the next shot. (00:06:05)