Yu Yu Hakusho: Dark Tournament Cheats

Enter the following codes at the cheats menu:

[Square], [Up], [Square], [Circle], [Down], [Circle] - Unlock every fighter
[Square], [X], [Circle], [Square], [X], [Circle] - Infinite Spirit Energy
[Circle], [Square], [Down], [Left], [Circle], [Square] - No damage to player one
[Up], [Square], [Left], [Square], [Circle], [Square] - No damage to player 2
[Circle], [X], [Right], [X], [Up], [Square] - Turbo mode
[Circle], [Square], [Circle], [Square], [Square], [Down] - Unlock all cards
[Up], [Down], [X], [Circle], [Square], [Right] - unlock all chapters
[Up], [Right], [Left], [Right], [X], [X] - Unlock all environments
[Left], [Right], [Down], [Right], [X], [Circle] - Unlock all modes
[Square], [Up], [Square], [Circle], [Down], [Circle] - All Fighters

Unlock Arenas
Beat dark tournament episode 6: Survival mode
Beat dark tournament episode 7: Tag team mode
Beat dark tournament episode 13: The cliff
Beat dark tournament episode 21: The cave
Beat dark tournament episode 22: Dark arena
Beat dark tournament episode 30: Pro mode
Beat dark tournament episode 30: Crashed arena
Beat Younger Toguro's arcade mode without losing: Training Dojo