Now also consider: Pokemon Legends Arceus essentially canonized in-universe, the pre-Dexit fan concept of Pokemon being heirlooms passed down through generations of people, with the ancestor characters using the same mons as their present-day descendants. Wouldn't that be a weird reference to make?

And with Pokemon Z-A we're likely to see the same thing again, with ancestors of various Kalos characters using the same Pokemon as the present-day descendants, as if they get passed down the way real players once wanted to. It's a very strange creative choice if Dexit is truly the new norm.