Naruto: Narutimate Portable Cheats 

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Second story mode:
Finish all 100 floors in story mode to unlock a second story mode with 30 floors.

Bonus characters:
Finish all 100 floors in story mode to unlock Orochimaru, Kabuto, Jiraiya, Shizune, Tsunade, and Sasuke.

Finish all 30 floors in second story mode to unlock Kisame, Itachi, and the third Hokage.