im late but as much as i love alola it runs pretty concise with "gamefreak is dogshit at showcasing indigenous people in good light". you could try to explain that the fact youre from the yamato japanese region educating the ainu on their incorrect religious beliefs is just a side effect of the isekai stuff
I don’t really like the optics of Legends: Arceus, but strangely enough I think the nuances actually get a lot murkier the deeper you look into the details of the game’s lore. Because technically, the Diamond and Pearl Clans are stated to have been settlers themselves, who came to Hisui well after the original Celestica people (who understood the true unity between Arceus and time and space and all that) were scattered by some vague upheaval. So in a way, the game’s actual indigenous Hisuians are all but extinct, and it’s their name and belief system that were coopted by unrelated settlers, who are now seen as the indigenous population by the newest round of settlers, and then there’s you, a kid from the modern day whom the god that the original Celestica people recognized decides to catapult back into the past to bridge all these gaps.

but why the fuck is the alolan protag from kanto. literally 0 narrative importance and its not like pokemon ever gave a shit about making a realistic "newcomer" to a region considering the only other time youre ever from another region is in hoenn
Honestly I think they mostly just did it for the 20th anniversary glitz. “What if we made the player come to the new region from Gen 1 land?”