Zone of the Enders: The 2nd Runner Cheats

To use 4 different versions of Jehuty, simply clear the game.
You can use 4 versions of Jehuty in either on story mode, extra missions, and versus mode (note that you have to unlock Naked Jehuty by finding and fighting it at the last stage (the Aumaan Base) in order to use it on versus mode.)

Once you completed all the missions with a highest record, the black background will be replaced with Yoji Shinkawa's illustration which resembles his sketch of Jehuty.

To unlock Naked Jehuty, you have to find the decending way to Aumaan (the last stage). At the end of the way, there are two paths with lasers blocking the inside route, shoot them, and you'll found Naked Jehuty inside, fight and win him, and you'll unlock him!

To Unlock Inhert, clear the game once, use any version of Jehuty, try to fight storyline mode for the second time, fight your way through Lloyd's city Underground Base.
The location is at the second level of the Underground base, before you reach Lloyd, wait for the pillar to retract (the 2nd level of the moving pillars), and you will see a small Inhert at the left side corner. Grab it, and he'll be unlocked!

Complete the game on any difficulty.

To unlock Aumaan Anubis, clear the game once, and start the new game with all sub-weapons equipped, and try to get into Margrifier, the place where you have to unlock the gate....On the left route (always go left), there is a dead end along the way to the generator. Use Vector Cannon to blast the blocking stones to clear a secret path.
You'll be brought into the Wind Tunnel, fighting tons of enemies. destroy them, and you'll be brought into an unfamiliar location, where you'll have to fight Aumaan Anubis. Destory it and you will find the small icon of Aumaan Anubis, grab it and it'll be unlocked.

Provided that if you have Visual Works of Anubis, Pop the special demo disc into your PS2. In the main title, there is an option of 3 : New Game, Save, and Options.
Play through the demo, and after you clear the demo, you'll be brought back to the title screen. SAVE it.
Once saved, pop in your Original ZOE2 game again, and all Ex-missions and VS mech will be unlocked.
(NOTE: This only applies to the Japanese version of the game Anubis : Zone Of The Enders only. It will not work on Zone Of The Enders : The 2nd Runner)