All Working Mega Man Zero 3 Cheats - GBA

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.

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

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

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 [L] and press [Start].

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 [R] and press [Start].

Defeating Inarabitta
The most effective way of defeating this Boss is to use Recoil Rod + Hyper jab (the Ex skill from Deathtantz Mantisk). Because your Hyper Jab destroys his missiles/torpedoes, all you have to do just charge straight up to him and press "Jab" repeatedly. He may sometimes leap away or fire the arrow beam. This does not matter because it is well worth it. If you have the Fire Armor, put it on and it will be an even swifter victory.