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Goku and Krillin want to be trained in the martial arts by the great Master Roshi. The only way he will agree to train them is if they go to Devil’s Castle to find the Sleeping Princess, who is being held prisoner by Count Lucifer, and bring her back to his island.

How to Watch Dragon Ball: Sleeping Princess in Devil's Castle Legally and Safely

If you want to stream Dragon Ball: Sleeping Princess in Devil's Castle through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Dragon Ball: Sleeping Princess in Devil's Castle films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.