I just dug up my old Acekard 2i purchased when the DSi was released and updated its firmware to AKAIO 1.8.8. When I boot the 3DS up I see the Acekard logo in the game slot, but when I try to run I get "An error has occured..." I read Acekard 2i is supposed to run on 3DS 2.1.0 but does that include 2.1.0-4?
1.Download the files needed to update:AceKard 2i firmware 1.4.3 - Direct Download 2.Extract, you get to files: ak2ifw_update_3ds_v2_DSi (if using a DSi) and ak2ifw_update_3ds_v2_DSL (if using a DSL) 3.Copy the one you need to the root (start) of the sd card 4.Plug your DS(i) to the charger (to avoid any problems if DS runs out of battery while doing the update) 5.on the start of the AKAIO menu, look for the file you copied and press (A) 6.Start menu shows, read precautions. once done press (START) 7.Wait untill the progress bar reaches 100%. It will take a few minutes for this to finish 8.Once the Progress reaches 100%, it will tell you to reboot the DS