A lot of Nintendo 64, game boy, Nintendo, Super Nintendo, and sega games.

Other good games super smash brothers, Mario kart (although you can get various mario kart versions with the membership), Nintendo odyssey is good for kids. Zelda breath of the wild or tears of the kingdom is incredible for adults. Kids still like it but better if a little older. I’d buy them all digitally. It is just so much easier. Often if you do that it’s good to get extra memory card. You can find that on Amazon. Just search for switch memory card.