Wait, hold the fuck up.

We now know that Ash is now canon to the Sun & Moon games, but we don't know exactly how.

However, we know that he leaves his literal best pokemon with the protagonist, as well as the protag being from the Kanto region.

Also Ash would be around the same age as Red and Blue, and those two look about in their mid twenties in this game.

Could Ash possibly be the protagonist's father? It would make a lot of sense.