Daughters are getting a DS for Chrimbo and I've got them both an R4. My question is, can I only put backup DS games on it, or can I put .gba files on it as well?
Smart-ass answer: Sure, you can put all of the .gba games that you want, but you'll never be able to run them. non-smart ass answer: In order to play GBA games with a flashcard, you need a slot 2 card such as an EZ Flash 3-in-1.