Catnapped! The Movie

Toriyasu is an extremely cynical young boy who doesn't believe in anything out of the ordinary. His younger sister Miiko, on the other hand, is the complete opposite and is convinced that the disappearance of their dog, Papadoll, is due to an alien abduction. Late one night three strange cats appear in the siblings' room and whisk the pair off to Banipal Witt, a bizarre world entirely inhabited by cats. As if a land that exists atop a giant sleeping cat wasn't odd enough, the moment they step onto the ground Toriyasu and Miiko are transformed into cats themselves! They soon learn that Papadoll has been captured by the spoiled and cursed Princess Buburina and is being used to wreak havoc. Toriyasu is skeptical at first, but when Miiko is taken hostage, he decides to cooperate with the cats to stop Lady Buburina, and rescue Miiko and Papadoll before the next sunrise!