How did you jump to that conclusion? Sword and Shield introduced Galarian forms while Alolan forms were still transferable to the game, and Legends Arceus had Alolan Ninetales available despite introducing new Hisuian forms. They most certainly could introduce new regional Pokémon in Gen IX...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.