https://www.gamespot.com/articles/nintendo-switch-adds-first-classic-nintendo-game-t/1100-6453628/

It may not be the Virtual Console service that Nintendo Switch owners have been waiting for, but the first classic Nintendo game is now available for the console. Today, the arcade classic Mario Bros. arrives in the Switch Eshop, kicking off Nintendo's newly announced line of Arcade Archives titles.

Mario Bros. is one of Nintendo's earliest titles, originally releasing in arcades in 1983. Up to two players can compete or cooperate with each other as Mario and Luigi, guiding the plumbers around a single screen and defeating enemies as they emerge from pipes. Unlike later Mario games, however, players can't jump directly on enemies to dispatch them; rather, you need to punch the floor beneath them to turn them over, then kick them before they can regain their footing.