I had 2x 2DS' and got 2 N3DSXL's today. So the first thing I did on the 2DS' was go to Format system to free up the NNID on each device. I was under the impression that should be it. So now on the N3DSXL I have emunand updated to 10.5 and go to link the NNID and says I cant, 022-2591 and ID already linked to another 3DS. I restored the Emunand before I did the system format, then that gives a 022-2634 which I believe means that ID is linked on the nand but not with Nintendo's database. So what gives? I cant add to new 3DS because it's on another device, but I cant login with old device because it says its not associated anymore. Edit: Ok I got one to work. I went on the original 2DS, and then restored the emunand, which still gave 022-2634. then I did tinyformat, then tried to link the NNID and this time it worked. Then I did system transfer since both had emunand on 10.5. Of course this wiped all the cia's I had started to install. And also took much longer as it had to transfer all the nothing I had on the 2DS.