Cheat:
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 
Or 
Hold R + White and press Up, Down, Up, Down.
Release R + White and press X, X, X.

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 
Enter the options screen and select "Audio", then "Language". Select the "B-Side" 
option to hear a third commentary track. Note: This is only available in the North 
American and European version of the game.

Unlock "Through the Portal" bonus Rikimaru mission: 
WHITE, UP, BLACK, DOWN, L, R, LEFT

Ninja Dog multi-player character:
Get a "Grand Master" rank in all of Ayame's missions. 

Semimaru multi-player character:
Get a "Grand Master" rank in all of Rikimaru's missions.

Super Shuriken: Get a "Grand Master" rank in mission 1. 
Exploding Arrows: Get a "Grand Master" rank in mission 2. 
Chameleon Spell: Get a "Grand Master" rank in mission 3. 
Flash Bomb: Get a "Grand Master" rank in mission 4. 
Dog Bone: Get a "Grand Master" rank in mission 5. 
Invisibility Spell: Get a "Grand Master" rank in mission 6. 
Fire Spell: Get a "Grand Master" rank in mission 7. 
Viper Potion: Get a "Grand Master" rank in mission 8. 
Ninja Armor: Get a "Grand Master" rank in mission 9. 
Fireworks: Get a "Grand Master" rank in mission 10. 
Super Shuriken: Get a "Grand Master" rank in mission 1. 
Decoy Whistle: Get a "Grand Master" rank in mission 11. 
Binding Spell: Get a "Grand Master" rank in mission 12. 

Easy kills around corners:
When you have your back against a wall and are peeking around a corner, if there 
is a guard there, toss a poison rice ball (the one with the green leaf) by pressing Y. 
As soon as the guard picks it up, run around the corner and Stealth Kill. It does 
not matter if he is facing you, but try to kill him before he eats it. By doing this you 
can use the same rice ball on multiple guards.

Different person in cut scenes:
In order for this cheat to work you need to have the invisibility ninja item for 
Rikimaru and the the disguise ninja item for Tesshu(i suggest using the all items 
cheat). At the item screen select these items. When you get to the point before the 
cutscene use the the item and when the cutscene begins your character will either 
invisible(Rikimaru)or dressed as an enemey(Tesshu)note:this affect doesnt last 
very long.