Naruto: Path of the Ninja 2 Cheats

Unlock the 2nd Hokage's Blade
Go to the Ninja School in the main town. Talk to Konohamaru. After completing the game, take the ticket to Shizune. She will give you the 2nd Hokage's Blade.

Silver Blade Ticket: C, F, J, H, I, L, E, G: Get the Silver Blade Ticket

Konohamaru Password
When entering the school, talk to Konohamaru. He is on the ground floor between the Mission and Challenges doors. Entering the password gives you a character item. These character items unlock the character, but it can only be used after you have beaten the game.

D K F I A B J L: Unlocks Gaara
I K A G D E F L: Unlocks Gai
J G D L K A I B: Unlocks Iruka
G B E I D A L F: Unlocks Itachi Uchiha
E B J D A G F L: Unlocks Jiraiya
A L J K B E D G: Unlocks Kankuro
G J H L B F D E: Unlocks Kyuubi Naruto
A H F B L E J G: Unlocks Orochimaru
H F I C L K B G: Unlocks Temari
C G H A J B E L: Unlocks The Third Hokage

Unlock Characters in Wi-Fi Mode
Some Characters you unlock By Either Winning matches,Getting wi-fi points,or by getting Regional cards:

Haku: Get 10 regional cards
Jiraiya: Play 10 rounds(doesn't matter win or lose)
Nine-Tailed Naruto (OTK): Get 100 Wi-fi points
Sasuke: Win at least 1 wi-fi match then talk to the guy next to Anko
Sasuke Second-State: Get 30 regional cards
Tsunade: Play 20 rounds(doesn't matter win or lose)