Continuity mistake: After Kooky says that Mario is their prisoner, the orange heads of the Hammer Bros. turn cream-coloured. (00:05:31)
Continuity mistake: When Mario is brainwashed, his white teeth turn skin-colour. (00:06:01)
Continuity mistake: When the Lame Brainer comes off Mario, the wrench he is holding disappears. (00:09:43)
Continuity mistake: At the end of the episode, Toad's house changes from orange to pink. (00:10:46)
Continuity mistake: When Luigi says he and Mario agreed to never fight again, Mario's blue eyes turn green like Luigi's. (00:10:57)
Continuity mistake: When Luigi asks if Mario is all right, Mario's brown hair turns black. In the same shot, the yellow eyes on Luigi's Frog Suit briefly turn white. (00:09:54)
Revealing mistake: When Mario is being pulled into Pipe Land, he and the line appear from thin air. (00:05:00)
Continuity mistake: When Mario says the leak is fixed, he is holding a wrench, but when Luigi enters the dungeon, he is holding a plunger. This also happens when King Koopa tells him to attack Luigi. (00:08:39)
Continuity mistake: At the beginning of the episode, Toad's house changes from orange to purple. (00:00:44)