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Gamera vs Gyaos (1967)

IMDb: 5.1
1967

Volcanic activity unleashes a bloodthirsty monster called Gyaos that Gamera must confront

Gamera tai Shinkai kaijû Jigura (1971)

IMDb: 3.6
1971

Space aliens arrive on Earth with their giant shark and intend to take over the planet but they must first destroy Gamera