https://www.gamespot.com/articles/pokemon-lets-go-pikachu-and-lets-go-eevee-must-hav/1100-6459347/

Like many traditional games in the series, Nintendo Switch's upcoming Pokemon RPGs--Let's Go, Pikachu and Let's Go, Eevee--will feature online play. However, there have been conflicting reports over whether or not players would need to subscribe to Nintendo's premium online service to take advantage of those features. The Pokemon Company has now confirmed that will indeed be the case.

In a statement shared with GameSpot, The Pokemon Company elaborated more about the online features that will be available in the Let's Go titles and confirmed players will need to have a Nintendo Switch Online subscription in order to play the games online. The statement reads: