Mega Man Zero 4 Codes -

Z-Knuckle charged shots:

Downward and forward: Press , , , Fire.
Forward: Press , , , Fire.
Upward and forward: Press , , .
Upward: Press , , , Fire

Z-Saber charged shot:
Press , , , Fire.

Z-Buster charged shot:
Press , , , Fire.

Hard mode:
Successfully complete the game.

Ultimate mode:
Successfully complete the game with all 51 parts and a fully upgraded Cyber Elf.

Busy Basket mini-game:
Successfully complete the game under the hard difficulty setting.

Elf Chase mini-game:
Successfully complete the game without making any chip recipes. Note: Parts and recipes can still be collected.

Hammer Harvest mini-game:
Successfully complete the game in less than one hour.

Magma Border mini-game:
Successfully complete the game with a complete database.

Plant Panic mini-game:
Successfully complete the game under the normal or hard difficulty setting with a Level 0 Cyber Elf.

Wood Chopping mini-game:
Successfully complete the game with an overall "S" rank.

Energy Laboratory mini-game:
Beat the high scores of all the other mini-games.

Bonus chip:
Use a link cable to connect to Mega Man Zero 3. Select "Comm" to trade any chip into the game.