This is a Pokémon concept.
It is based around the idea of Fairy Tale, of guilds instead of gyms. Trainers start from wherever they are in Earthland and they get there pokemon from the closest guild.
The biggest guilds are ones with enough members to be able to send them out on request instead of keep them inside their influence. The idea behind the guild is a governing/policing force for wherever they are based.
My concept was based around the actual storyline of Fairy Tale, but there aren't mages there are trainers. (Ex: Lucy has a Klefki as her partner)