Megalon. Megalon acts as the guardian and god of the underground nation of Seatopia, who seeks revenge on the surface world after nuclear tests ravage Seatopia's territory. Since Godzilla x Kong ...

But cockroaches? The underwater kingdom of Seatopia and its big beetle baddie were certainly strange in the follow-up, Godzilla vs. Megalon, but the fact Gigan takes itself a bit more seriously ...