Continuity mistake: During the whack-a-robot game, a big chunk of the broken robot lies on the counter, but it disappears a shot later.
Continuity mistake: After the first clash with the Witch, as the narration says Hua Jun 'dies', but Mulan lives. The close-up on the blade shows a hand gripping it a couple inches below the blade, while whenever we see her face, before and after that close-up, she is holding it with her finger alongside the guard. (01:03:45)
Continuity mistake: When the first witch turns into a mouse, the way her empty dress lies on the table changes between the first and second shot, in a mere frame. Check the plate on the left, for example: it swaps from uncovered to covered by the dress. Also, the first shot shows more lace by the edge of the table, while the second shot shows much more silky fabric.
Deliberate mistake: In the Spanish release, the name of the family store is written in Spanish, but inside the place it's in English everywhere. This is a very common mistake in foreign kids' films released in Spain.