The world of “Pokémon” is evolving with “Pokémon Horizons: The Series,” a show with two brand new protagonists after Ash Ketchum finally caught ’em all and became the very best, like no one ever was.

I think most Pokemon fans can admit that Ash really is only as good as his companions. It’s a brutal truth, but as a fully static character, his reactions to things are magnified or decreased based on ...