I was given this...very sinful card on my birthday after buying my own red DSLite in college. My roommate had one and told me about how he could use this to play any rom of DS games. Sure enough you can with this. As the DS is now considered Retro and isn't getting anymore new content, I'm sure every single DS game's rom is available for us on this. Honestly I loved this thing back then since broke college student. But now, I'd much rather OWN my games, physically. I've a good library of games I do want and have for DS. The only games I have on this now are roms for Game Boy games. Meaning old ass hell GAME BOY roms. Namely MegaMan I-5 and other very vintage game boy games. This is now my Game Boy (and GB Color) cart since there's an emulator you can put on this. Any DS games I want I have bought now. Still have a few more I want though, till then I do have some of em on this card as well. Great for previewing games before you buy them I guess but otherwise you could just play roms all day every day with this.