Original Mario Bros. will support online co-op through Nintendo Switch Online

Nintendo promised online-enabled NES games as part of the Switch Online service, and the company today gave one example…

These games support voice chat on the Nintendo Switch - The Verge

Nintendo Switch Online Subscription Service - Nintendo Switch Guide - IGN

Super Mario Bros Wonder review – an all-levels multiplayer with madcap moments of delight, Games

Join Mario, Luigi, and pals for single-player or multiplayer fun anytime, anywhere! Take on two family-friendly, side-scrolling adventures with up to

New Super Mario Bros.™ U Deluxe

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Game sharing on the switch allows both people to play at the same time. (more info in the comments) : r/NintendoSwitch

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Super Mario Bros. Wonder - Nintendo Switch, Nintendo Switch

Super Mario Bros. Wonder Co-Op Review

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Super Mario Bros. Wonder Co-op Gameplay of Our Favorite Levels *will our friendship survive?*

Is Super Mario Bros Wonder Multiplayer? Local and Online Co-op - N4G