In the real world
In the Kaiju Multiverse
- Monster Island is destroyed by an underground nuclear test. Angered by such tests, an underwater civilization called Seatopia sends forth their monster god Megalon to destroy the surface world. Gigan arives on Earth to assist. Fortunatly, Godzilla and a humanoid robot named Jet Jaguar arive and team up to fight the two monsters, eventually driving Megalon back underground and forcing Gigan back into space.
- Zone Fighter teams up with Godzilla and beat the Garogas and their monsters, including Gigan and King Ghidorah.
- Ultraman Taro guards Earth from monsters.
- The monster Gamera sacrifices himself to kill a swarm of Gyaos and save humanity.
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