Zone of The Enders Cheats (Playstation 2)

How to unlock versus mode

Successfully complete the game on any difficulty setting to unlock versus mode with five frames and most stages.
Successfully complete the game on any difficulty setting TWICE to unlock the remaining two frames and stages.

The easiest way to unlock the versus mode is:
press CIRCLE, X, RIGHT, LEFT, RIGHT, LEFT, DOWN, DOWN, UP, UP at the title screen.
If you entered it correctly, you will hear a sound and "Versus" will appear at the main menu.