The best firmware for acekard 2i,acekard all in one known AKAIO verion 1.5 released.This update includes fixes for over 100 games. Many of these fixes have not been released until this point. Along with Wii connectivity, clone-blocking updates, and a POR fix which is the first in the scene which make the acekard 2i still the best flashcard for DSi.Here is the full changelog of AKAIO 1.5:

AK-AIO 1.5
+ Fixed issue with the hiddenFileNames globalsettings option not accepting non lowercase filenames.
+ Optimizations to the AK2 dldi should be a little quicker now.
+ Update Dutch translation (Thanks MarioWaza).
+ Update Spanish translation (Thanks Pendor).
+ AK2/AK2i clones are now officially unsupported.
+ Gba icon has been removed from main selection screen on DSi.
+ Removed outdated plugin system.
+ Per rom GBA frame support (256x192x15bpp)
- Place BMP with internal game id of gba rom in __aio/frames.
+ Added support for save sizes up to 256Mbit (32Megabyte).
+ .sav is now default save extension.
+ Reverse Alphabetical List sorting (set sortListAlpha=0 in globalsettings.ini).
+ Auto-Anti-Piracy Patcher updated.
+ ARGV support for homebrew.
+ New DSi detection (Shouldn't show slot2 icon after softreset on ak2i now).
+ Disable start menu by adding "LockStartMenu = 1" to your globalsettings.ini
+ Fixed Trainer Toolkit support.
Please refer to LoaderChangelog.txt for compatibility fixes.

You can download akaio 1.5 at the author’s site:AKAIO.1.5.rar

You can get more information about Acekard 2i flashcard at:Acekard 2i