I also went to a local game store and they also have the Asian version. It can play US games... according to this http://ucables.com/nintendo-3ds-c12489 JPN games are only for Japan or Asian systems... so maybe it can play JPN games too.
Yes, after hitting the A button, the upper screen turned into bright purple for a second then you'll see a quick glimpse of akaio menu loading the game, I was surprised it worked! If I can I'll try to make a video of it later
Yey! I manage to load my back-up games with AKAIO 1.8.5a on MenuDo (instead of going to akaio like before, it now loads the game with akaio's loader)
I just edited the last two line in the _menudo\donors\nds.ini
Before:
Akaio's autorun must be enabled too.
autorunWithLastRom = 1
Even AAP...