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Do you think Sinnoh forms could be a thing if/when they do Gen IV remakes? Like Alolan forms are really cool, my one gripe os that there isnt enough, even just Gen I mons.
Rowan gives you the pokedex because he just got back to Sinnoh from Kanto else and wants to compare what he found in other regions to the natural pokemon of Sinnoh. I think this could be an easy set-up for Sinnoh-form pokemon, some gen 2 and maybe gen 3 alt-forms. They could keep it Kanto, or change it to Alola to make it a bit more fitting.
The excuse could be something like the ones that didnt get new eveolutions adapted in other ways to the harsher, colder climate of Sinnoh.
Either way, i just dont think this is it for region-based forms. Like how they added new Megas to ORAS, GF could add Sinnoh Forms to continue it. Sinnoh remakes also make sense as a way to make Kanto forms of Gen 1 pokemon more easily available.
