If you guys haven't noticed, when you start a new game and choose your gender, on the Japanese version it showed a 3D running character and on the English version it's just your characters on the bottom screen rather than the top. You can't use a save from an entirely different game in this case, that if some things are completely different, it's not going to be possible.
I tried using my Japanese version save, and it shows up in the load menu, but if you start it, it goes into a black screen and never progresses, thus being stuck and forced to reboot. So dudes, both games are different, meaning the English version has been changed drastically by nintendo, fixing any glitches that may have been in the game. I know in platinum, you could use your Japanese save but both games were roughly the same. Also you could play platinum plus with your save. But again, this case is different and you cannot EVER you use your old saves, ever again on the English version. Sorry guys, at least until anti-piracy has been patched through.