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Species Human (Seatopian)
Occupation Emperor of Seatopia
First appearance Godzilla vs. Megalon
Played by Robert Dunham,
Goro Naya (voice, Japanese version),
Ted Thomas (voice, English dub)

Emperor Antonio (シートピア司令アントニオ,   Shītopia Shirei Antonio, lit. Seatopia Commander Antonio) is the ruler of Seatopia in the 1973 Godzilla film Godzilla vs. Megalon.


Showa era

Godzilla vs. Megalon

Even though he and his people were by no means inherently violent, when atomic tests conducted by the surface-dwellers threatened the stability and very existence of his country, Antonio appealed to the Seatopians' god, Megalon, to go forth and destroy the surface-dwellers. He also sent two of his agents to the surface to steal Jet Jaguar, to act as a guide for Megalon, and when Godzilla's intervention threatened the Seatopian plan, Antonio called upon the M Space Hunter Nebula Aliens to ask for Gigan's assistance as well. In the end, after Megalon's defeat, Antonio recalled the monster and sealed off the entrance to the surface world.

Reiwa era


Megalon, Gigan, and Little discussed the history of Seatopia and its people, describing it as a utopia ruled by King Antonio.

Video games

Godzilla: Trading Battle

In this game, Emperor Antonio is among the various opponents who can challenge the player to a duel.

Godzilla Defense Force

In the face of a great Xilien invasion, past foes become allies, with Emperor Antonio being an unlockable ally who can join forces with the player and the Earth Defense Force against the Xiliens' monsters.



Godzilla vs. Megalon



  • Although Antonio's actor Robert Dunham could speak both English and Japanese fluently and had delivered his own lines in prior film appearances such as Dogora, he was dubbed over by Goro Naya in the Japanese version and Ted Thomas in the English version of Godzilla vs. Megalon.


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