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This final installment of the recent Gamera trilogy begins with schoolgirl Ayana discovering a large egg in a cave that, according to legend, houses demons. The egg hatches into a small monster, which Ayana decides to raise and quickly develops as psychic bond with. As Ayana's monster, named Iris, grows to adulthood, the flying turtle Gamera begins to take an interest in this new potential threat. Who will be the victor in the final battle, and how much of Japan will be left standing at the end?

How to Watch Gamera 3 Revenge of Iris Legally and Safely

If you want to stream Gamera 3 Revenge of Iris 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 Gamera 3 Revenge of Iris 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.