Primary Collection of Cheats
Impossible difficulty setting
Highlight the "Difficulty" selection at the options screen. Then, quickly press [Left]x4, [Right]x2, [Left], [Right], [B].
Fight as Alpren
Successfully complete the game with all default fighters.
Counter mode
Successfully complete the game in arcade mode four times to unlock the "Counter" option at the extras screen.
Crazy mode
Successfully complete the game in survival mode to unlock the "Crazy" option at the extras screen.