I'm thinking about writing a MLP Monster High story it's just going to more like an anime and less like the real Monster High cartoon.

I would like some suggestions for what I should do in the story, like what monsters I should use, what plot point I should make in the story, and also I know the tropes of anime but I've only one anime series (Digimon) and I would like some help with knowing what to do in the story to make it like an anime.

Also what do you guys count as a monster?