Bomberman Wars Codes -

View the Bomber Prince:
Complete ten stages in quest mode, then enter the practice room. Place all characters in the hallway, then return to the practice room. The Bomber Prince will appear approximately 50% of the time.

Faster game:
Hold Circle and press Start at the title screen to begin the game without the special effect sequence.

Bonus levels:
Enter 3636 as a password. Alternately, successfully complete quest mode one time. The "Honey" and "Cotetsu" levels will be selectable.