Play as Kyubi or Demon forms of some characters

To play as the stronger demon and kyubi forms (for some selected characters only), first unlock all the characters in the game (inluding the 4th Hokage). When in a character select sreen, do the ff:
Cheat 	Effect
Hold R1 then pess O to choose the character. 	You will be able to play as that characters demon or kyubi form 
Missing characters with a NH3 savegame.

If you have a NH3 savegame on your memory card everyone except the following characters will be unlocked. This is how you get them.
Unlockable 	How to Unlock
Deidara 	Beat him in RPG Mode
Sasori 	Beat him in RPG Mode
Kisame 	Beat him in RPG Mode
Itachi 	Beat RPG Mode
Chiyo 	Beat RPG Mode
Yondaime 	Complete Hero Mode
Unlockable Characters

In case you don't have a save game from "Naruto Hero 3" in your memory card, you can unlock secret characters by performing the stated tasks.
Unlockable 	How to Unlock
Orochimaru 	Playing "Hero Mode", you get him in the level after Naruto fights him.
Haku 	Defeat him in "Hero Mode"
Zabuza 	Defeat him in "Hero Mode"
Temari (old version) 	On "Hero Mode", unlock the scene of her fight against Shikamaru during the Chuunin Exams.
Kankurou (old version) 	On "Hero Mode", unlock the scene of his fight against Shino during Konoha's Invasion.
Sandaime Hokage 	On "Hero Mode", defeat Orochimaru using him during Konoha's Invasion.
Nidaime Hokage 	On "Hero Mode", unlock the scene of Sandaime's funeral.
Gaara (old version) 	On "Hero Mode", defeat his nearly full Shukaku version using Naruto.
Jiraiya 	On "Hero Mode", unlock the scene where Naruto protects Tsunade from Kabuto.
Kabuto 	On "Hero Mode", defeat him using Naruto.
Godaime Hokage (Tsunade) 	On "Hero Mode", unlock the scene where she attacks Orochimaru.
Shizune 	On "Hero Mode", unlock the scene where Tsunade attacks Orochimaru.
Get the Yellow Flash 	Collect all the peices of memory in Master Mode (including the special ones) and go play and beat Hero mode
Get Chio 	Finish master mode
Get Itachi 	Finish master mode
Get Kisame 	Beat in master mode
Get Didara 	Beat in master mode
Get Sasori 	Beat in master mode 


    *
      Get 100 000 Yen When Starting A New Game

      To get 100000 Yen when you start a new game, have a Narutimate Hero 3 save on your memory card.
    *
      Unlock all character except 6

      If you have a NH3 save on your memory card you unlock all the characters except for Deidara, Sasori, Itachi, Kisame, Chiyo and the 4th Hokage.