Eternatus

Eternatus is an upcoming antagonist of ''In a Locked Room. ''Known as the Gigantic Pokemon, this Poison/Dragon type is spoken of in the legends of the Galar region for bringing about the Darkest Day. It is said Eternatus provides the energy that allows Pokemon to Dynamax, a mysterious phenomenon that greatly increases their size.

Reminiscent of an Ultra Beast, its true origins are unknown, and its goals are unclear. Galaximus has made clear that Eternatus should belong to her, for they seem to be a fitting duo. But as of yet, Eternatus shows no loyalty to anyone but itself.