LogFAQs > #975656501

when it comes down to it we have Regional Variants that evolve from Kanto forms, we have Regional Variants who evolved into newly named pokemon, so doing both isn't much of a concern

although I'll admit Dudunsparce didn't even cross my mind even after VI's been mentioning it, I just thought he's a big fan of the pokemon and it had nothing to do with the contest lol. Of the cross-gen evos in S/V we got Clodsire, Annihilape, Dudunsparce, Farigiraf, and Kingambit and Clodsire's really the only "regional variant" evolution... *shrug*

it's absolutely a fair question and I think it gets even harder with Paldea, but in regards to Hisuian ones I think it makes the decision easier that the game literally doesn't add a single actual new Pokemon so it's not like those few Pokemon are making any other list and it really feels like they're just remixes of the old just like every other regional form