Hmm.... pretty cool concept.
I have an idea.
Maybe in some mountainous town/city (preferably) there would be a two twins/really close friends/couple, gym leaders, (think: tate and liza from hoenn) that were the fire/water type gym leaders one being the fiery passionate one and the other being the level-headed person that is the mature one.
Also, are you going to implement megas for your fakemon?!