Dual Heroes

Cheat mode:
Press Left(2), L(2), Right(2), Left(2) at the main menu to unlock the cheat menu.

Invincibility:
Enable cheat mode, then press R(7), Left.

Alternate costumes:
Press Z when selecting a character in any mode except story or practice.
Information in this section was contributed by Game Master.

To change your suit color in story, practice, or robot mode, select your character. When your character bio appears, press Z, A.
Information in this section was contributed by lkalex.

Fight as GYN:
Enter the options screen and set the difficulty to normal, and choose two round mode. Then, successfully complete story mode using any character. GYN may now be selected in any mode except for story mode.

Fight as Ray:
Enter the options screen and set the difficulty to hard, and choose two round mode. Then, successfully complete story mode with Hana. Ray may now be selected in any mode except for story mode.

Fight as Zorr:
Enter the options screen and set the difficulty to hard, and choose two round mode. Then, successfully complete story mode with Juie. Zorr may now be selected in any mode except for story mode.
Information in this section was contributed by Game Master.

Hint: Instant kill:
To get an easy kill in two player mode, press Analog-stick Down to put life down and wait until it shows a little bit. Note: This only works in two player mode against other person.
Information in this section was contributed by JVPaasonen.