I'd suggest you go to a specialist site and ask instead of asking here where 99% of the users are lost.
http://gbatemp.net/index.php?showforum=40
from best to crappiest.
CycloDS Evolution, Supercard DS One, Acekard RPG, M3DSReal, Acekard 2, EDGE, TTDS, R4/M3, numerous R4 ripoffs/clones...