Naruto: Gekitou Ninja Taisen! Cheats (GameCube)

Unlock Kyuubi Naruto, then successfully complete the game in single player mode as him.
Then, successfully complete the game in single player mode as Kakashi. Highlight Kakashi
at the character selection screen and press X or Z.

At the character selection screen, highlight a fighter and press Y.

Successfully complete the game with all default characters in single player mode to unlock
the "Sounds Test" option in the Omake menu.

Unlock Rock Lee, then successfully complete the game in single player mode with all
characters. Then, highlight Nartuto at the character selection screen and press X or Z.

Play the game in story mode. Use no continues and defeat Zaibuzan. Defeat Rock Lee when he
appears to unlock him.