Naruto: Uzumaki Chronicles Unlockables and Secrets (PS2)

Naruto: Uzumaki Chronicles is a video game for the PlayStation 2 that is based on the popular manga and anime series Naruto by Masashi Kishimoto. Unlike the previous Naruto titles on the PS2 (Naruto: Ultimate Ninja and Naruto: Ultimate Ninja 2), which were fighting games, Naruto: Uzumaki Chronicles is an action/adventure game. This is also the first 3-D Naruto game not to use cel-shaded graphics. Bandai Namco has finished working on the sequel, Naruto: Uzumaki Chronicles 2, which was released in Japan on November 16, 2006. The game is entirely translated and features no Japanese voice track.

Unlockables

Rewards for beating the game
Certain things can be unlocked once you finish the game.

Boss battle - finish the game once.

Gaara as support character - finish the game once.

Kakashi as support character - finish the game once.

Shuriken pattern - finish the game once.

Secrets

Chakra Refill Boost
During the loading screen if allocated enough time to move the right thumbstick enough in a circle a blue Chakra Ball will pop-out and if you notice your unfilled Stamina / Chakra Ball it will refill a little about 25% worth everytime you do this between loading screens with the Konoha Symbol in the lower right corner.

Here are a couple of cool moves from Naruto: Uzumaki Chronicles, all featured in following video: