NARUTO: CLASH OF NINJA UNLOCKABLES
Kyuubi Naruto
Unlock Rock Lee, then finish the game in single player mode with every character. Then, highlight Nartuto in the character selection screen and push X or Z
Rock Lee
In story mode use no continues and beat Zaibuzan. Beat Rock Lee when he becomes visible to unlock him
Sharingen Kakashi
Unlock Kyuubi Naruto, then finish the game in single player mode with him. Now finish the game in single player mode with Kakashi. Highlight Kakashi in the character selection prompt and push X or Z.
Sound test
Finish the game with all default characters in single player mode to unlock the "Sounds Test" option in the Omake menu.
Sharingan Sasuke
When at the highlght screen press X or Z to unlock.