A: The Secret Episode (the final bonus chapter) requires you to collect specific "Secret Files" throughout the main game. If you use an "unlock all items" code, you may receive these files out of order, which can either instantly unlock the Secret Episode or permanently lock it. Always keep a backup save.
A: Yes. As long as your 3DS is modded, cheats work identically on both cartridge and digital versions. The Title ID remains the same. project x zone cheat codes