>>23032044But new generations would require new regions, and therefore new pokemon.
Older generations can be Mega-retconned like Hoenn was, and they can update it to 3D while introducing Megas on pokemon occurring in those games.
Think about it:
>KantoLots of Gen 1 megas
A few megas from other gens
>JohtoLots of Gen 2 megas
A few megas from other gens
>SinnohLots of Gen 4 megas
A few megas from other gens
>UnovaLots of gen 5 megas
A few megas from other gens
I absolutely don't want this to happen, but it'd be a very easy way for (the very lazy) Gamefreak to make effort-free remakes while adding enough little new material to force people to keep buying new games.