Yeah, that's right! OR, I think that's right, anyway. Ghosts in this world are a little different than regular spirits.

Um, kind of like the difference between a ghost and a poltergeist, if you know it?

[Her Sinistea seems quite pleased by the waves in response, making strange little bell noises in tandem with the Mimikyu.]

Both of these two are Ghost types, so they use a shadowy kind of power to fight with other Pokemon. As opposed to, like, fire, or water, or ice.