Well, if you had multiple servers, you could have more than one Mewtwo. Although there is a precedence for more than one legendary. There do seem to be multiple Articuno, yet only two Moltres, and we have not seen Zapdos outside of the second movie. There was an episode with a Lugia and a Lugia child something in the fourth season I remember, yet legendaries besides Manaphy cannot breed; even then, it becomes Phione.

I would imagine that most battling would be PvP once you get to level 50 or higher. Pink Butterfree? Scarved Butterfree? Butterfree/Vulpix/Pikachu raised on Brock-brand-food? Ohh, sir, you have me titillated.

Epic does not begin to describe the possibilities. If you compared this to a normal MMO, there'd be 486 classes, each one having more than something of 1000 builds, personalities, special skills, and etc., whatnot.

Seriously. RPG MAKER NAO