First you need a Flashcart. There's a lot to choose from. If you want to run GBA games you have to buy an expansion for your cart, for example: EZ Flash V 3-in-1. Then you have to get som kind of program that let you do something with the GBA games(don't know what)so you can play them on your DS. Well, I didn't explain so well how you play the GBA games, but a little. You know what kind of cart you've to buy(EZ Flash V 3-in-1). Hope it helped a little!
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