I have an idea for the elite four, make your own ocs or top trainers to be in the elite four but they are in guilds and guilds can get their own area to make gyms and they won't be like guild gyms but they are like areas like Dragon City where you can buy and place stuff and put pokemon there...
Such as Alolan Vulpix, Cubchoo, Glaceon, Sneazel, Seal, Spheal, and SNOM, I think Snom would fit really well as a Hat! OH! And can you also add a Ditto Hat? Please and Thank you!