>>48617354that sounds like a really good premise
every city has a crystal that powers up a certain type, drawing in trainers of that type and leading to gyms centered around that type to form in the town
works really well for a villain group too, they could try to steal the crystals or draw their power in some way for whatever their evil goal is
could also be a legends sort of thing in that it takes place in the past, and explains to reasoning behind why gyms are almost exclusively 1 type
at least thats my take
