At the main menu do the following:
1. Hold R1 + R2 then press Square, Triangle, Square, Triangle
2. Hold L1 + L2 then press right, up, right, up
3. Press L3 + R3 at the same time.
This will unlock all characters except for Hanabi and 4th Hokage.
|Unlockable||How to Unlock|
|'Might Suit' Naruto||Finish Narutimetto Road(story)|
|1st and 2nd Hokage||after completing udon and moegi's challenge, do ebisu's challenge at the resturaunt next to the scroll store|
|All other characters||Do Naruto Eiyuuden|
|Anbu Kakashi||Finish Narutimetto Road(story)|
|Anko||Beat her in Narutimetto Road(story)|
|Asuma||Beat him in Narutimetto Road(story)|
|Hanabi Hyuuga||'Date' her in Narutimetto Road(story)|
|Konohamaru||do moegi and udon's riddle game at the academy(after the story)|
|Kurenai||Beat her in Narutimetto Road(story)|
|Yellow Flash(4th Hokage)||get the other 41 characters|
Go to the room where Iruka-Sensei is (the house in front of Ichiraku Ramen) and talk to him. Select the 2nd option, then the 2nd option again. There will now be scrolls on top of Ichiraku Ramen. Repeat.