Final Fantasy III (NES/DS): Onion Knight Job – No AR Code Needed
There is no Action Replay code to unlock the Onion Knight in Final Fantasy III (NES original or 3D remake). It's unlocked in-game by design.
How to Unlock Onion Knight (Both Versions)
Beat the final boss (Cloud of Darkness / Xande).
Watch credits / save clear data.
Start a New Game / New Game+.
Onion Knight is now available at the initial job selection (or via the Job Change menu at any crystal).
Why No Code Exists / Works
Job data is flag-based in the save file (bit flag set on clear). AR codes modify RAM, not the persistent flag reliably.
The 3D remake (DS/PC/PSP) ties Onion Knight equipment to the Mognet sidequest (exchange letters with NPCs via Wi-Fi/local), but the job itself unlocks on clear.
Cheating the flag often leaves the job unusable (no stats, no gear, crashes on equip).
Onion Knight Stats (3D Remake)
Can equip all weapons/armor (including Onion Gear from Mognet).
Stat growth: Balanced high. Masters all magic.
Requires mastering multiple jobs for best performance (hidden mechanic: each mastered job boosts Onion stats).
Play through once. The journey is the unlock. The Onion Knight is your victory lap.