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…

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

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

Super Mario Bros. Wonder Has Co-Op Limitations

Super Mario Bros. Wonder is Nintendo multiplayer done right

Nintendo's Next Mario Game Is Here And It's Not What You Expect

Does Super Mario Bros. Wonder have local and online co-op?

Mario Odyssey playable with 10 players in new multiplayer mod

Find wonder in the next evolution of Mario fun , Classic Mario side-scrolling gameplay is turned on its head with the addition of Wonder Flowers.

Super Mario Bros. Wonder - Nintendo Switch

Super Nintendo Entertainment System™ - Nintendo Switch Online - Nintendo Official Site