Z
 Z
Enter these cheats on the password screen
Full metal jacket-- square o x triangle triangle x o square.
Invincibility-- square triangle o x x o triangle square.
During play press triangle on pad 2 to destroy the enemies base.

Level Select
Enter the password Triangle, Triangle, X, Circle, Triangle, Triangle, X, Circle.
Level Passwords
Level
Password
2
Square, Triangle, X, Circle, Triangle, Square, Circle, X
3
Square, Triangle, X, Circle, Triangle, Square, Circle, X
4
Square, Triangle, X, Circle, Circle, Triangle, X, Circle
5
X, Circle, Square, X, Triangle, Square, X, Circle
6
Square, Circle, Triangle, X, Circle, X, Square, Circle
7
X, Circle, Square, X, Triangle, Triangle, X, Circle
8
X, X, Circle, Triangle, X, Circle, Square, X
9
Circle, X, Circle, Square, X, Circle, Square, Circle
10
Circle, Triangle, Circle, Circle, Square, Triangle, X, Circle
11
X, Square, Circle, X, X, Square, Square, Circle
12
X, X, Circle, X, Circle, X, Square, Circle
13
Circle, Triangle, X, Circle, Triangle, Square, X, Circle<TRCLASS="TD-COLOR"
14
Square, Triangle, X, Circle, Triangle, X, Circle, Square
15
Square, Triangle, X, Circle, Square, Triangle, X, Circle
16
Circle, X, Circle, Square, Square, X, Square, X
17
Circle, Square, Triangle, X, Triangle, X, Circle, Square
18
Square, Circle, Square, X, X, Circle, Circle, Triangle
19
X, Circle, X, Circle, Triangle, Triangle, X, Circle
20
Triangle, Triangle, X, Circle, Triangle, Triangle, X, Circle
Full Metal Jacket Mode
Password: Square, Circle, X, Triangle, Triangle, X, Circle, Square
Invincibilty
Password: Square, Triangle, Circle, X, X, Circle, Triangle, Square
Enable Controller Two
Password: X, Triangle, Square, Circle, Triangle, Circle, X, Square

 Z-Gundam
Play as GP-01Fb
Finish the battle mode with any robot.
Play as GP-02A
After you get GP-01Fb, use GP-01Fb to finish the battle mode.

 Zeiramzone
Versus Mode
At the Main Menu, rotate the D-Pad 360 degrees, then press X, Square, Circle, Triangle. If done correctly, you will hear a sound and Versus Mode will be available.

 Zeitgeist
Side View
Pause the game and hold Start for 10 seconds, then press L2 + Start.
Top View
Pause the game and hold Start for 10 seconds, then press L1 + Start.

 Zero 4 Champ Doozy J
Sound Novel Mode
Enter "NOVEL" as a first name and "SOUND!" as a last name.
View Development Staff
At the Title screen, press Down + L1 + R1 + Circle.
Always Get 777 on Slot Machines
Pause the game while the slot machine is spinning and press Up, L1, Select.

 Zero Divide
Hidden Mini Game
While the game is turning on, hold Select + Start on controller 2. Keep holding until the hidden game appears.
Hidden Mini Game Invincible
At the Option screen, highlight the speed action and press Left/Up + L2 + R2 + Triangle.

 Zero Divide 2
Play as Neco and Modoki
Beat the game with Nox and Eve.
View Neco's Demo
Beat the game with any character, then hold Select + Start to restart.
Alternate Character Color
At the Character Selection screen, hold Select on controller two and press X, Circle, Square, Triangle, L1, L2, R1, or R2.
Extra Levels
Each time you beat the game under one of the three difficulty settings, two additional levels become available, for a total of six new levels.

 Zig Zag Ball
Full Energy
During gamplay, do not press any buttons for over two seconds, then press Right, Right, Up, Up, Left, Down, Left, Down, X, Circle.
All Items
During gamplay, do not press any buttons for over two seconds, then press Right, Up, Down, Left, R2, L2, L1.
Open Exit Doors
During gamplay, do not press any buttons for over two seconds, then press Right, Up, Right, Up, Select, Select, Start, Start.