Nymphali is just an ordinary filly living in the Pokémon Nation, a country right next to Equestria that somehow went unmentioned in the show. Well, that's irrelevant because I said so. Oh yeah, Nymphali gets a Pokémon, some ponies die and stuff, there's another Celestia-tall alicorn who's the ruler of the Pokémon Nation, and some stuff with forests. Lovely description, I know. Just wait until you read the actual thing. Congrats for getting this far without burning your eyes out.