>>41847299>because ideally you'd do both.No, ideally you'd write and plan out everything in the story you feel is feasible with the Pokemon you are adding, as well as making sure that everything you typically add to a third version(s) - plot with extra legend, postgame, BP facility, etc - is present and accounted for, and then make the game as if it was in fact that third version(s).
Alternatively, if you absolutely had to redo the same game, you'd do it how Gen 5 did:
>Tell complete story in the first game>Second set of games are full-fledged sequelsNeither of these are the world we live in. The one we live in has GameFreak
>Release trial versions with bare minimum of features, a litany of performance/gameplay issues, and bugs out the asses Masuda shoved them in>Later take existent games and add extremely minor changes and shit that should have been in the original>Split it into two functionally identical copies>Sell for retail price of base game 