The subscriptions are redeemable only through the Nintendo eShop on the Nintendo Switch system. Nintendo Switch Online is a paid service that gives members access to online play in compatible games, a selection of NES games, extra features for the Nintendo Switch Online smartphone app, and more. Here are the benefits of subscribing to Nintendo Switch Online: Play online with other players be it co-op or battle in games like Mario Kart and Super Smash Bros. Ultimate. Nintendo Entertainment System - Nintendo Switch Online Enjoy classic NES games with newly added online support! Titles are added regularly. With your save data backed up regularly, you can easily retrieve them anywhere, anytime.