Don't post based on here-say. Digital copies will never be editable as the NAND stores data from specific E-Shop saves to prevent save file backup/restore; physical cartridges can't directly interface with a computer like an SD card can, so they do not have any anti-restore.
Flashcarts don't do 6.0 encryption properly, and they save games with bad encryption, making them incompatible with unhacked consoles (and thus only playable on hacked ones unless you delete the save).
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Please keep to topics directly related to PKHeX.