You can't transfer with an NNID attached if your console is banned from NNID services (022-2812). If you have an NNID, it will ask you to log in to it, and that will throw the 022-2812 in your face and stop your transfer. Sorry, your Four Swords won't be useful, go get SUDOKU for $2.
I'd recommend modifying your serial in SecureInfo_A before buying it and doing the transfer, assuming you don't want the ban to move over with the transfer.
So sudoku works for dsi downgrade ?







