Boss Rush...
	Boss Rush Mode Modifiers...
	Nightmare Mode...
	Ultimate Mode...

After you've unlocked Nightmare Mode and Ultimate Mode, you'll automatically gain access to the Boss Rush, which gives you control of all four party members and a selection of their subweapons. Note that you can only equip one subweapon per character per fight, and Zangetsu doesn't have any of his special abilities from the Bad Ending route.

Hold down the corresponding button for the modifier you want while selecting the Boss Rush option. You may use more than one at once. You'll hear a different sound to confirm it has been successfully entered.

Code	Effect
L Button	Nightmare Mode Difficulty.
R Button	Ultimate Zangetsu.
X Button	Infinite Weapon Points.
Y Button	HP / WP Restore After Each Battle.

After beating the game on Normal Mode, you'll unlock Nightmare Mode, which continues the story and gives you immediate access to all the characters except Zangetsu.

Beat Normal Mode, but kill all of your companions instead of recruiting them.