During Gameplay Cheats
Enter the following cheats after pausing gameplay.
Boost Score: Hold WHITE + BLACK and enter RIGHT, RIGHT, RIGHT, LEFT
Boost Offense: Hold R + WHITE and enter UP, DOWN, UP, DOWN
Display Score: RIGHT, RIGHT, RIGHT, LEFT
Full Kuji meter: Hold R + L and enter LEFT, LEFT, LEFT, RIGHT, X
Get one Kanji: LEFT, LEFT, LEFT, RIGHT, X
Restore Health: UP, DOWN, UP, DOWN, X, X, X
New Special Ability: Hold R + BLACK and enter UP, UP, DOWN, DOWN, release R + B and enter X, X, L

Item Cheats
Enter the following cheats at the Ninja Item Select screen.
All Ninja Items: Hold R + L and enter UP, DOWN, UP, DOWN, X, X, X, LEFT, RIGHT, LEFT, RIGHT, X, X, X
Infinite Capacity: Hold R + L + WHITE and enter UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, release WHITE and enter X, X, X
More Ninja Items: Hold R + L and enter UP, LEFT, DOWN, RIGHT, X, X, X

Mission Cheats
Enter the following cheats at the Mission Select screen.
Open all Layouts: Click Right Analog, Click Left Analog, L, R, WHITE, BLACK
Unlock all Missions: WHITE, WHITE, L, R, RIGHT, X, Click Left Analog, Click Right Analog

More Cheats
Enter the following cheats at the title screen.
Unlock All Characters: Hold WHITE + BLACK and enter UP, RIGHT, LEFT, DOWN, release WHITE + BLACK and enter L, R
Unlock B-Side Audio: Hold L + R and enter DOWN, X, X, UP, X, X, LEFT, X, X, RIGHT, X, X
Unlock "Through the Portal" bonus Rikimaru mission: WHITE, UP, BLACK, DOWN, L, R, LEFT

Ninja Dog
Earn a Grand Master rank with Ayame on all missions

B-Side Story
Earn an Expert Ninja rank with Rikimaru and Ayame on all missions, and earn a Professional rank with Tesshu on all missions.

Teleport Through Ceilings
To pass through ceilings, cling to the ceiling, equip the grappling hook, and then press Y. You should pass to the next floor of any multi-tiered building