Naruto: Ultimate Ninja Heroes (PSP)

Naruto: Ultimate Ninja Heroes cheats:

Game Unlockables
Unlockable - How to Unlock

Hokage (third) - Clear all 30 floors in Second Story
Itachi - Clear all 30 floors in Second Story
Jiraiya - Clear all 100 floors in Story mode
Kabuto - Clear all 100 floors in Story mode
Kisame - Clear all 30 floors in Second Story
Orochimaru - Clear all 100 floors in Story mode
Sasuke - Clear all 100 floors in Story mode
Second Story - Clear all 100 floors in Story mode
Shizune - Clear all 100 floors in Story mode
Tsunade - Clear all 100 floors in Story mode

Hidden Team Skills
Use the following custom made team characters in Heroes Mode to unlock a new skill. The characters can be selected in any order.

Effect - Code

Akatsuki - Itachi and Kisame
Association of Ninja Thugs - Itachi, Kisame, Orochimaru
Aurora of Legends - Orochimaru, Tsunade, Jiraiya
Author & Fan - Jiraya and Kakashi
Eternal Rivals - Kakashi and Guy
Hard Work - United Lee, Naruto, Hinata
Hidden Spikes - Any Team combo
Hot Blood Master & Student - Guy and Lee
Indonmitable Guts Points x 2 - Naruto and Jiraiya
Maidens In love - Ino, Sakura, Hinata
Proof of The Existence - Sasuke, Naruto, Gaara
Sharingan to the Max - Sasuke, Itachi, Kakashi
Team Byakugan - Neji and Hinata
Team Genius - Neji, Sasuke, Shikamaru
The Cursed - Orochimaru and Sasuke
Triple Trouble - Naruto, Kiba, Chouji
Uchiha Clan - Sasuke and Itachi

Unlocking Characters in Naruto USA
All in Heroes mode:

Effect - Code

Gaara - Leaf Destruction!! (Normal)
Itachi & Kisame - Atatsuki Returns (Insane)
Kakashi & Guy - Survival Exercise (Easy)
Tsunade, Orichmaru & Jiraiya - The Legendary Sannin (Hard)

Other Sites you may consider
CheatServer.Com
Cheat Codes Club