Complete ten stages in quest mode, then enter the practice room. Then, place all characters in the hallway and return to the practice room. Now the Bomber Prince will appear approximately 50% of the time.

Quicker game

While you are at the title screen, hold Circle and press Start to begin the game without the special effect sequence.

Extra levels

Beat quest mode once. Then, the "Honey" and "Cotetsu" levels will become selectable.