>>51776519depends on the game but I mostly agree
>Kantoyou get them early game, revive late-game
>Johto(HGSS)obscure to get, revive post-game
>Hoennyou get them mid-game, revive backtrack
>Sinnohyou get them badge 2, revive just as you get them (this is one where I disagree)
>Unova(BW)you get them mid-game, revive backtrack
>Unova(BW2)you get them post-game, revive post-game (why GF fuck off)
>Kalosyou get them before badge 2, revive just as you get them
>Alolayou get them before grand trial 2, revive backtrack (you have Charizard from KANTOOOOOO though)
>Galaryou get the separate pieces mid/late game (game is so short that it's hard to separate), revive around the place you get them
>Paldeaapparently none, we gettin cucked 
