Guilty Gear X (GBA)

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Alternate costumes

Press Start or Select when choosing a fighter at the character selection screen.

Extra mode

Defeat a fighter's dare devil version in survival mode to unlock extra mode for that fighter. The fighter's extra version is able to execute new moves and supers.

Fight as Dizzy or Testament

Press Down, Right(2), Up, Start at the "Press Start" screen.

Guilty Gear mode

Select survival mode. Get to stage 180, then continue on and defeat all opponents until reaching stage 330. The Guilty Gear versions will now be unlocked.

Original mode

Successfully complete the game in survival mode to unlock the "Original Mode" selection at the options screen.

Unlock Dizzy

Defeat Dizzy when she challenges you in stage 10.

Unlock Testament

Defeat Testament when he challenges you in stage 9.