Revealing mistake: During Jack's memories, when he is holding the antlers up to his head, Jack's sister's boot can be seen coming through the fabric of her dress.
Rise of the Guardians (2012)
1 revealing mistake - chronological order
Directed by: Peter Ramsey
Starring: Alec Baldwin, Hugh Jackman, Chris Pine, Isla Fisher
Factual error: When the Guardians start collecting the teeth, the skylines indicate that their first destination is Shanghai, but the billboard that the Tooth Fairy flies into is in a heavily Japanese visual style, from font weight to outlines and pastel colors. (00:37:05)
More questions & answers from Rise of the Guardians
Answer: Jack is the guardian of fun. It's stated in the film.