Dual Blades

Alternate costumes:
Press Start while selecting a character.
Information in this section was contributed by Louie.

Impossible difficulty setting:
Highlight the "Difficulty" selection at the options screen. Then, quickly press Left(4), Right(2), Left, Right, B.

Fight as Alpren:
Successfully complete the game with all default fighters.
Information in this section was contributed by jbryant31.

Counter mode:
Successfully complete the game in arcade mode four times to unlock the "Counter" option at the extras screen.
Information in this section was contributed by jbryant31.

Crazy mode:
Successfully complete the game in survival mode to unlock the "Crazy" option at the extras screen.
Information in this section was contributed by jbryant31.