Hello folks !
I do not know if the questions were already answered, I do not found any hint about it.
- Is it possible to use the same NNID on two 3DS after a system transfer and a NAND restore on the 3DS source ?
As I know, it is possible to revert the NAND at its previous state on emuNAND, but I do not know if NNID account is furthermore usable on it.
- Is it possible to do a system transfer from a 3DS, and later do another transfert in the other way from the old target to the old source ?
My goal is to be able to use Pokebank with the same NNID on two machines to ease Pokémon trade between my legit games and ROMs.
It's not possible to have the NNID on two machines simultaneously. Using a service that requires an NNID on the firmware restored device will disconnect your NNID and invalidate/delete all purchased eshop applications.
Sorry :/