So as you've read the thing that rang through your mind while you did was probably "what the hell is this?" well I'll explain. In this RP humans don't only inhabit the world with Pokemon but also with Demons a subspecies that originally came from an alternate dimension called Hell. Demons, like Pokemon come in very different shapes and sizes and are able to blend into our daily lives.
Angels on the other hand come from Heaven yet another alternate dimension, however unlike Demons, Angels are rarer in numbers and not a lot of variants of them have been seen as of yet aside from the human looking ones that you'll expect to see.
Second thing. The Pokemon regions exist alongside every other country in our world, they are each stationed in different parts of the world but are put together due to their similarity to each other in that they rely on Pokemon more than other countries and as thus have been able to do advancements through it.
There are different species of Demons but they, like humans with abilities have abilities unique to their personality.