You’d need an (emulator)[http://www.ndsemulator.com/] and the approriate rom. Also, for it to be legal, you would have to own the game (as in, go and buy the cartridge, even if you won’t actually use it). Honestly, I suggest just buying the DS, it’s become quite cheap (unless you want to go for the 3DS, like a boss). It’s also very fun to use, has awesome games, and is NIGH INDESTRUCTIBLE.
You’d need an (emulator)[http://www.ndsemulator.com/] and the approriate rom. Also, for it to be legal, you would have to own the game (as in, go and buy the cartridge, even if you won’t actually use it). Honestly, I suggest just buying the DS, it’s become quite cheap (unless you want to go for the 3DS, like a boss). It’s also very fun to use, has awesome games, and is NIGH INDESTRUCTIBLE.