I-Ninja cheats and cheat codes for Playstation 2

Unlock Battle Arena 
Earn all the Grades, then you will get the Master Grade and unlock the
battle arena.


Skip stages:
Press Start to pause game play, after hold R1 and press Square, Square, 
Square, Circle. Release R1, after hold L1 and push Triangle, Triangle. 
Release L1, after hold and push R1, Square, Square. 

Upgrade sword:
Press Start to pause game play, after hold L1 + R1 and press Circle, Square, 
Circle, Triangle, Triangle, Square, Circle, Square. 
Re-enter this code 3, 4, or 5 times to get the Soul Sword.


Big head mode:
Press Start to pause game play, after hold R1 and press Triangle, Triangle, 
Triangle, Triangle. Release R1, then hold L1 and press Triangle, Triangle. 
Hold R1 + L1, after press Triangle, Circle, Triangle 

Sword list:
Notice that the sword color changes in the your belt changes.
1. Ninja's Sword
2. Golden Sword
3. Jade Sword
4. Sapphire Sword
5. Fire Sword
6. Soul Sword 

Healing:
If you are low on health, try to find some weeds and chop them down. Notice 
that your Rage Ability switch will gradually increase. Keep chopping down 
weeds and you will soon be able to use your "Ninja Revive" to heal yourself.

Rage skills:
1st skill: Ninja Berserk
2nd skill: Ninja Revive
3rd skill: Ninja Shuriken
4th skill: Lightning Rage