Nintendo DS and Nintendo DSi games will display in a lower resolution than Nintendo 3DS games. There is no way to change this; however, if you wish to play them in their original resolution, hold down START or SELECT when loading the game.Nintendo DS and DSi games will not display in 3D.The HOME Menu cannot be accessed while playing Nintendo DS or DSi games.Nintendo DS or Nintendo DSi games are not compatible with StreetPass or SpotPass.Nintendo 3DS family systems cannot access any features or use any accessories that access Slot 2 on the Nintendo DS (Game Boy Advance game slot.)
Yes! You can play all your Nintendo3DS/2DS games. You can also play nearly all Nintendo DS and Nintendo DSi titles. Plus, many upcoming gameswill play best on the new system.