''I knew that tuna-eating monster was useless!''

— Controller of Planet X, after Zilla is defeated by Godzilla (Godzilla Final Wars)

One of the Xiliens' many mind-controlled monster pawns, Zilla was unleashed in Sydney, Australia before he was teleported away as the Xiliens tried to pose as humanity's saviors. When their plan was exposed by the Earth Defense Force and Godzilla was freed from Antarctica, Zilla was deployed to battle him in Sydney. Zilla was quickly defeated by Godzilla, who swatted him aside with his tail and finished him with a blast of his atomic breath.