Just wondering, I am going to buy nintendo online, but in competitive battleing (in the game), are their OU, UU, etc? Are there doubles?
You need a Nintendo Switch Online membership to do battles with player across the world, but you do not need one to do local battles with players in your vicinity. There are no OO UU tiers because they are fanmade. Yes there are also Double battles. Link is for anything else that you might want to know.