Mega Man Zero 3 Codes -

Ciel mini-game:
Successfully complete the game with an "S" rank on all missions.

Copy-X mini-game:
Successfully complete the game under the hard difficulty setting.

Fefnir mini-game:
Successfully complete all missions with 100 points.

Harpuia mini-game:
Successfully complete the game by only using the Zet Zaber and get an "S" rank.

Leviathan mini-game:
Successfully complete all missions with 100 points.

Phantom mini-game:
Successfully complete the game by only using the Buster Shot and get an "S" rank.

X mini-game:
Successfully complete the game, then use your cleared saved file to complete the game a second time.

Zero mini-game:
Successfully complete the game.

Hard difficulty setting:
Successfully complete the game, then highlight the "New Game" option at the main menu, hold and press .

Ultimate difficulty setting:
Successfully complete the game after all the hidden discs have been collected. Then highlight the "New Game" option at the main menu, hold and press .