Godzilla vs. Megalon
Dreaded Megalon from the undersea kingdom!
3/17/1973
Imdb: tt0070122
Tmdb: 39264
Popularity: 17.116
Vote: 6.2/10 (191)

Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.