You can play many Game Boy games starting today.
Game Boy has been announced for Nintendo Switch Online. Advance games are also available with added Expansion Pack for members. As of today, you can play Tetris, Super Mario Land 2: 6 Golden Coins, The Legend of Zelda: Link’s Awakening DX, Gargoyle’s Quest, Game & Watch Gallery 3, Alone in the Dark: The New Nightmare, Metroid II: Return of Samus, Wario Land 3, and Kirby’s Dream Land. You can adjust the screen to use the different Color filters as you play your favorites. The Advance games you can play are Super Mario Advance 4: Super Mario Bros. 3, WarioWare Inc.: Mega MicroGames, Kuru Kuru Kuruin, Mario Kart: Super Circuit, Mario & Luigi: Superstar Saga, and The Legend of Zelda: The Minish Cap.
Later games expected to arrive are Metroid Fusion, Fire Emblem, Golden Sun, F-Zero: Maximum Velocity, Kirby & the Amazing Mirror, The Legend of Zelda: Oracle of Seasons, The Legend of Zelda: Oracle of Ages, Kirby Tilt ‘n’ Tumble, and the Pokémon Trading Card Game.