The Acekard 2i with AKAIO firmware - http://shoptemp.com/products/Acekard-2i-Card-for-Nintendo-DS-DS-Lite-DSi-p-30.html http://forum.romulation.net/index.php?topic=38335.msg695431#msg695431
Acekard 2i Back in the day I would have said M3 Real (which is what I have) but it sucks now having to patch everything or as an easier path using the Sakura firmware.