Ok, So does anyone know if it's possible to make a NAND backup work with the MT CARD exploit? The reason I ask is because of the following: I downgrade my 3DS from 9.2 to 4.5.x I use MT Cards emuNAND feature Update emuNAND to 9.4 Try running Pokemon Y from a retail card Pokemon says the save data is corrupt, but when I restore my NAND backup (9.2) - Pokemon works again. I believe it has something to do with the EXTDATA, perhaps downgrading the console to 4.x messes Pokemon's extData up? Would be awesome if I could do this: Create 9.2 NAND backup Downgrade console Use MT exploit Inject NAND backup into EMUNAND Play Pokemon Y again. Any suggestions?