Nuclear tests cause a chain reaction that awakens a monster god, Megalon, on Monster Island. In Japan, three friends, Goro, Rokuro, and Hiroshi, must band together to stop the Setopians, led by Emperor Antonio, from unleashing Megalon on the surface world.
Godzilla vs. Megalon
A brilliant inventor creates a humanoid robot named Jet Jaguar, which is then taken by the underwater nation of Seatopia. The Seatopians utilize Jet Jaguar as a guide to send their monstrous warrior, Megalon, to wreak havoc on the surface world in retaliation for the nuclear tests that have ravag...