There’s definitely some overlap. Almost all D&D players have played at least one pokemon game at this point. Hell even us old M:TG holdouts that thought that “Pokemon was for kids” when it came out when we were teens played Pokemon GO, though I know enough to know that PG wasn’t really a pokemon game.

I will admit that D&D players still make a minority of Pokemon players, but I maintain that’s mostly because people think D&D is way more complicated than it actually is. The rule books don’t help here. In all actuality most players will never read most of those books, because 90% of the “rules” won’t apply to your game.