Unlock Two Hidden Fighters
Enter the codes during the Fighter Select screen to unlock the two hidden versions of Jado and Hiro. Note that you need to reenter them again if you lose your matches in any solo mode.
Hiro 2 - Highlight Hiro then [Start], [Up], [Up], [Down], [Down], [Left], [Right], [Left], [Right], [Start]
Jado 2 - Highlight Jado then press [Start], [Down], [Down], [Up], [Up], [Right], [Right], [Left], [Left], [Start]