It works on flash card but not on-line, and the 7.1 emu-nand do not support Pokemon
7.1 EmuNAND Classic mode works with Pokemon X/Y, if you want online then buy the game.
No, it saids save data interrupted. The flash card is MT-card
Are you using a legit retail cartridge? If so, do you have a previous savegame that is made from a 6/7 firmware?