Continuity mistake: After Mario says that he is surprised that King Koopa is surrendering, Toad's blue trousers turn brown. (00:01:01)
Continuity mistake: When Mario looks at the picture of King Koopa, his brown hair turns black. This also happens when he saves Princess Toadstool. (00:03:02)
Continuity mistake: When Luigi and Toad run through the halls, the Sledge Bros. shake the floor. Toad's purple shoes turn skin-color. This also happens when the Flame Chomps fall out of a window. (00:07:17 - 00:09:44)