If this:Let me explain:
I have a A9LH 3DS XL USA and my friend a 3DS 11.2 EUROPE.
If i region change my A9LH 3DS Nand to system transfer to his 3DS, the transfer will work?
is true, you may have to make a second emunand, region change that back, and do it that way. Not sure since I have never done a region change, but worth a shot.I believe region changed systems can't do a system transfer anyways.