Hmmmm, now I have an idea, just not with your map. :P
I was thinking of having three~five regions; two (or more, depends) RPers in each region. Each region will have a different story: one region will be a regular trainer region, another would be a tournament only region, another would be a contest region, another would have a Battle Frontier, and I'm not sure about the fifth one, so I'll just say four for now. Somehow, I'll mesh all of the singular plots together and having everyone meet and have it all confusing. (nods to self) Oh yeah, I'm cool.
Of course, now I have to create names, places, and other stuff. I'm think of just doing Kanto, Almia, Hoenn, Sinnoh. Kanto for journey, Almia for tournament, Hoenn for contests, and Sinnoh for Battle Frontier. :) Think that would work?