Jordanlol
Trainer
If the other regions are implemented in a more multiplayer/"MMO" version, why not, upon character creation, allow the choice of a starter region (kanto, johto, etc.) and play through that story. Upon completion, I.E. beating the champ after the elite four, choose the next region/story to start, gaining another starter and an entirely different set of pokemon to catch.
Obviously this begs the question, "what about my previous party?", well my only suggestions are to keep them as they are and start the next region/story with higher level'd npc's, or, have a global PC inventory that separates the regions until a certain point in each region where the Bill's have the teleporter or the time machine... and as for a multiplayer/"MMO" aspect of the PC inventory, you could have a separate party specifically for the multiplayer that you can choose from you entire global PC inventory.
(Sometimes I think too much.)
Obviously this begs the question, "what about my previous party?", well my only suggestions are to keep them as they are and start the next region/story with higher level'd npc's, or, have a global PC inventory that separates the regions until a certain point in each region where the Bill's have the teleporter or the time machine... and as for a multiplayer/"MMO" aspect of the PC inventory, you could have a separate party specifically for the multiplayer that you can choose from you entire global PC inventory.
(Sometimes I think too much.)