In a few days I was planning to do a DSiWare downgrade for the first time. My idea was to unlink my current NNID from my 3DS without formatting (see here), then create an Emunand, make a new NNID, buy a DSi game, make all the stuff that is required and transfer the new NNID to the other system. When everything is completed, I want to delete the Emunand and log into my old NNID. Would that be possible? If not, is there an other way? I don't want to use my original NNID (I know I could transfer back the NNID after a week) because then I would have the unused money (used to buy the DSi game) on my NNID, not on the NNID on the other 3DS. I don't want to give my NNID away and make a new one for myself either.