for those who have an actual ds try looking up the M3 DS Simply it's really great and you can get it at www.kickgaming.com, it's where i got mine and it plays like an emulator on your DS itself so you can just download the roms and copy to a microSD card and then put the chip into the M3 (the M3 just acts like a microSD adapter) and the M3 fits into the DS game card slot..k i know my explanation sucks so maybe go look up the M3 DS Simply and find out..
I agree with the M3 Simply. So far, it plays all the games I want it to. No crashes at all. Lots of upgrades for it.