Beginning September 18, 2024, a Nintendo Switch Online membership is required to participate in co-op and competitive online features for many first- and third-party Nintendo Switch games, including Splatoon 2, Mario Kart 8 Deluxe, ARMS, and Super Smash Bros.
A Nintendo Switch Online membership may be required for online multiplayer and other online features in compatible games. This service also gives you access to classic NES!" and Super NES!" games, cloud saves, a smart device app, and exclusive offers. To learn more, visit the Nintendo Switch Online site.