Dragon Ball Movie 2: Majinjou no Nemurihime

Goku and Krillin both want to train under Master Roshi, but the old martial artist refuses to accept them without a test. Their task sounds simple: travel to Devil's Castle and bring back the legendary Sleeping Princess.

The castle belongs to Lucifer, a demon with plans far more dangerous than either boy expects. With Bulma and their friends caught in the middle, Goku and Krillin must fight through monsters and traps while learning that becoming Roshi's students will demand more than enthusiasm.