SaveSataFiler needs to read the CRT tool with the game card in gateway mode. One tiny problem once your 3DS is in GateWay Mode retail carts are not being read or picked up by the 3DS console and SaveDataFiler doesn't run in classic mode
PS. for Kaphotics
may not be a bug but iv noticed O-Power level max if edited in using PKHex once selected ingame there greyed out and they cant be used ? anyone else reported this ? i have PKHeX from the OP btw