This works with any .csu right? So savedatafiler... it exports decrypted saves and can import decrypted saves back into the game while setting their proper encryption? Both Card1 and Card2 titles?
I can personally only confirm that it works for my Pokemon X that I bought legitimately from the eShop. I believe it does exactly what the Datel Powersaves adpater does. It made a folder called "filer" on my SD card that contained a few other things, but the actual file you are looking for is just called "main". You can edit that and then go back into SaveDataFiler and import it back. I assume it will work with any game that is properly installed on your home menu (not sure about newer games).
Yep! I now have a Blaziken that knows all thunder moves.
I used it to add Volcanion just as a test. I tried to send one in a wonder trade but it said it could not find me a partner. =(