Guilty Gear cheats and cheat codes for Playstation

Unlock Hard mode
Hold Down + Square + L1 + R2 and the power button on the PSX.
Keep the buttons held until the phrase "Team Neo Blood" disappears.
If the code is accepted, the "Normal Mode" will change to "Hard Mode"
and "Hard" will appear above the two chaos bar.

Unlock bosses: Testament, Justice, and Baiken (Japanese version)
Hold Down + Square + L1 + R2 buttons at the Arc System Works logo.
Then, release those buttons, when the message "Team Neo Blood"
disappears. Now you can play as the bosses in versus mode.

Change colors
Press Square, Triangle, Circle, or X at the character selection screen.

Guilty Gear Game Shark Codes:

Characters for Player 2
8013904C 0000 - Potemkin -
8013904C 0001 - Zato-1 -
8013904C 0002 - Sol-Badguy -
8013904C 0003 - Ky Kiske -
8013904C 0004 - Chipp Zanuee -
8013904C 0005 - May -
8013904C 0006 - Axl Low -
8013904C 0007 - Millia Rage -
8013904C 0008 - Kliff Undersn -
8013904C 0009 - Dr.Baldhead -
8013904C 000A - Testament -
8013904C 000B - Justice -
8013904C 000C - Baiken -

Character for player 1
80139048 0000 - Potemkin -
80139048 0001 - Zato-1 -
80139048 0002 - Sol-Badguy -
80139048 0003 - Ky Kiske -
80139048 0004 - Chipp Zanuee -
80139048 0005 - May -
80139048 0006 - Axl Low -
80139048 0007 - Millia Rage -
80139048 0008 - Kliff Undersn -
80139048 0009 - Dr.Baldhead -
80139048 000A - Testament -
80139048 000B - Justice -
80139048 000C - Baiken -
-
Unlimited Time -
8007BF72 0000
-
Unlimited Health for player 2 -
8007CB68 00BC
-
Full Power for player 2 -
8007CB88 0040

Unlimited Health for player 1 -
8007CB98 00BC
-
Full Power for player 1 -
8007C8B8 0040
-