Watch Godzilla vs. Megalon (1973) (1973) HD Full Movie Free on SolarMovie. Watch Godzilla vs. Megalon (1973) (1973) online free. An inventor creates a humanoid robot named Jet Jaguar that is seized by the undersea nation of Seato...An inventor creates a humanoid robot named Jet Jaguar that is seized by the undersea nation of Seatopia. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.