I suggest that below every Pokemon Center there must be a union room(I mean there must be only one union room but all pokemon centres link to it
), a place where people can come to talk, chill etc. This place would not only help in making fun but reaching each other more easily for trading, battling, etc.
This feature used to exist in another MMO I played and they had made full use of it. There were sit-able chairs present(With tables of course) and there were 3 rooms. Rated Battle room, Unrated Battle Room and Trade room. Trade and battle could not take place in that room. I am not asking you guys to copy the exact idea, just use a little of it(If you like it
)