Eternatus is the origin of the Dynamax phenomenon unique to Galar. While it cannot Dynamax naturally, it uses the illusory and spacetime-warping powers of Galar particles fluently to appear gigantic before all.
Pokéfeature: Eternatus cannot Dynamax.

The being that caused the Darkest Day, the catastrophic event that shaped Galar’s ancient and modern history alike. It’s hypothesized that Eternatus can freely manipulate Galar particles because they are still part of its form.
Pokéfeature: Eternamax Eternatus can use Max Moves.