i want to play some gba roms that i have but my r4ds wont run them i DONT have a ds lite i have the bigger one so is there anything that i can but in my slot 2 to play gba roms Thanks
You could get an M3 or a Supercard... The M3 Lite comes with a shell that fits into an old Gameboy/Player and DS Phat, but the Supercard is much less expensive. I have no experience with the Supercard, but the M3 works with every game I've ever tried.
you can also get the 3-in-1 ez flash. most of the online places sell the ds lite version, but there IS an ds fat version. you just have to look, but there is for about the same price.