Dragon Ball: Sleeping Princess in Devil's Castle

Goku and Kuririn both seek to become students of Master Roshi. To earn this privilege, they must complete a mission to retrieve a sleeping princess from a demon's castle. As they embark on their journey, they are joined by Bulma, Yamchu, Oolong, and Puar. The task proves more dangerous than expected when they discover that the princess is actually a diamond. The group must work together to stop the castle's owner, Lucifer, from using the object to plunge the world into darkness.

Directed by Daisuke Nishio, this Japanese action fantasy film is the second of 14 films in his career, following Dragon Ball: Curse of the Blood Rubies and preceding Crying Freeman 1: Portrait of a Killer. The movie was produced by Toei Animation with a screenplay by Keiji Terui. The voice cast features Masako Nozawa as Son Goku, Mayumi Tanaka as Kuririn, Nachi Nozawa as Lucifer, Hiromi Tsuru as Bulma, Toru Furuya as Yamucha, and Naoko Watanabe as Puar.

Released on July 18, 1987, the film has a runtime of 45 minutes. It has received generally positive feedback from audiences, holding a 6.5 rating on IMDb based on 3,500 votes and a 6.7 rating on TMDB from 335 votes.