What if the 3DS was linked with a NNID, but was since removed via a system transfer? I'm assuming you wouldn't know for sure, but in theory, do you think it would work?
Not sure if this would make it easier or even solve it.
What if we have the Old3DS execute under Emunand and system-transferred it to another 3ds (new/old) Emunand, would the Old3DS Emunand become unlinked to the NNID?
Then we just need to use the unlinked Emunand to another system.