I'm a new a9lh user. I had to take the hard road (11.0.0-33e downgrade via a hard mod) so I'm not a complete virgin... but when explaining things please assume I know nothing. What I have: An o3DS XL with the hard mod, a9lh/Luma and a trash NNID. A n3DS XL without a9lh (stock) and a NNID I want to keep. I bought several games on that account and my Pokébank is on it! What I want: Use the o3DS to install a9lh on the n3DS with the DSIware Downgrade. I want to keep the good NNID on the n3DS. I have no credit card, so I have to buy a 15 euro eShop Code to purchase Fieldrunners. I'd like the remaining 10 euro on the good NNID. How to do it? Ideally I'd transfer the NNID from the n3DS to the o3DS; then transfer back in the DSIware Downgrade. But of course, that isn't possible. Now, other then a Pokémon savegame I don't have anything on the n3DS I care about. And even the Pokémon savegame I'm willing to abandon if that is what it takes. I read that when you format you 3DS it releases the NNID. Is that correct? Could I?: Format the stock n3DS XL to release the good NNID. Format the a9lh o3DS XL to clear the trash NNID. Setup the good NNID on the o3DS XL. Buy Fieldrunners on the o3DS XL with the good NNID. DSIware Downgrade from a9lh o3DS XL to stock n3DS XL; transferring the good NNID back to the n3DS XL in the process. Profit!