Naruto: Uzumaki Ninden Game Cheats ( PlayStation 2 ) Completion bonuses
Successfully complete the game to unlock the Boss battle, Gaara and Kakashi as support characters, and the shuriken pattern.
Refill Stamina/Chakara
At the loading screen, rotate the Left Analog-stick and/or Right Analog-stick. A Blue Chakara Ball will pop out. Your unfilled Stamina/Chakara Bar will regain about 25%. This is done between loading screens with the Konoha symbol in the bottom right corner.