getting GBA games to work

do you need a special card to load them on like you do for NDS games.. I have a R4 rev. card. but i found a few games that are for GBA.. that i really want. is there a way to make them work in the NDS slot.. or do i need a special GBA "ROM" card to load these games on.. If so WOW i can so see consolidating all my games to the ROM card n selling my inv. cartridges to put toward a DSI lol....

you need a GBA slot (slot 2) flashcart. There is no way of playing GBA roms without one.

ok tht is what i thought.. where do i obtain one.. i'd love to dl some of them as well. as i saw a few i like.. also what do u do to get the "regular" nintendo games to work.. can they play on the slot 2 card or slot 1 card.

Regular DS ROMs? Can run on both.