If you haven’t parted with your money for a Nintendo Switch Online subscription and you are planning to purchase the forthcoming Pokemon Sword & Shield then do not worry as it seems that the game will feature in-game purchases for online features that would usually require a Nintendo Switch Online membership. This is what it says on the website:
Nintendo Switch Online membership (sold separately) and Nintendo Account required for some online features. This game includes an in-game purchase option for users who do not have a membership. Not available in all countries. Internet access required for online features.
Pokemon Sword & Shield launch on Nintendo Switch worldwide on 15th November.