Continuity mistake: At the end of the last series, Mario had brown hair, but in the opening shot of the intro, he has black hair. Also in this shot, the book on the table has the yellow rectangle on it five centimetres away from the top it, but in the next shot, it is three centimetres away. (00:00:03)
Continuity mistake: When first showing The Adventures of Super Mario Bros. 3 book in the opening, there is a green border around the yellow rectangle in the centre, but in the next shot, the green border disappears.