ive been looking for a gameshark sp, but now that i bought a ds lite, i was wondering if those m3s or whatever do cheats. i dont know much about them, but i think they just play movies. it also came with a gba expansion pack, but i looked it up and cant find out what it does. thanks!
read this info on flash cards http://en.wikipedia.org/wiki/Nintendo_DS_storage_devices (i think all) these flash cards have built-in cheats. goto their website for more info.
Go with an Acekard2i. Works great and updating cheats is quick and easy. Do NOT by a legit Action Replay card. Action Replay does NOT make reliable products. Chances are the thing will stop working in a week. Buy a flash cart.