Toybox Series, Episode 3: Picturebook of 1936 (1934)

Peaceful citizens (one of whom resembles Felix the Cat) are dancing to music before their island is being invaded by a gigantic rodent that resembles Mickey Mouse. The islanders contact legendary folk-hero Momotaro from a giant book to battle Mickey.

Unfortunately the movie Toybox Series, Episode 3: Picturebook of 1936 is not yet available on HBO Max.