In order to use the password engine, go to the Ninja School (in the main town) and then talk to Konohamaru. You'll see some text in japanese, and consider it to be in this shape:
A B C D
E F G H
I J K L
Now, using this layout, input the passwords above (by pressing the romanji in the order stated) to unlock the character (or item) specified.
A L J K B E D G - Gives you an item that, when used, unlocks Kankuro.
H F I C L K B G - Gives you an item that, when used, unlocks Temari.
C G H A J B E L - Gives you an item that, when used, unlocks the Third Hokage.
D K F I A B J L - item for garra, when used, unlocks garra
I K A G D E F L - item for guy, when used, unlock gay
J G D L K A I B - item for iruka, when used, unlocks iruka
G B E I D A L F - item for itachi, when used, unlock itachi
E B J D A G F L - item for jiraiya, when used, unlock jiraiya
G J H L B F D E - item for kyuubi naruto, when used, unlock kyuubi naruto
A H F B L E J G - item for orochimaru, when used, unlock orochimaru
K A G B H L F D - item for kisame, when used, unlocks kisame
While some of the characters can be acquired by other methods, these ones can only be selected after accomplishing certain targets on the "Wi-fi Taisen" mode. Perform the following tasks in order to unlock the stated character.
Haku - 10 Wifi winning cards.
Jiraiya - Play Wifi 10 times.(Not counting win or lose)
Juin Sasuke 30 Wifi winning cards.
Kyuubi Naruto - 100 Wifi points.
Sasuke - Win at least one match online, then exit Wi-fi and talk to the guy exactly to the left of Anko. You'll get an item that, when used, unlocks him.
Tsunade - Play Wifi 20 times.(Not counting win or lose)
To get Kakashi and Guy, you have beat the game first then go to Kakashi's house then talk to Kakashi and Guy. Then you have to choose Kakashi to be in your party. Then you to Konohamaru and use the password to unlock Guy(shown in Passwords). Once you do that, you have both Kakashi and Guy.
Talk to Konohamaru to unlock secret characters in the game at the Ninja Academy in Leaf Village.
The password at the Touch Screen will most like Japanese Text.But consider in this shape:
Used the password below in the Touch Screen to get the secret characters item.
Note:These item can be used after you beat the game.
CGHAJBEL-The third Hokage
GJHLBFDE-Nine-tailed Fox Naruto
In order to play with an Anbu Member (who you can select the sex) as a selectable character in your party, complete the game once.
Complete the game once to unlock an option in the main menu that allows you to hear all the musics and sounds available in the game.
Characters that can be accuired from Ibiki`s mission.
Itachi - Mission `Saigo no Uchiha Zoku` Jounin rank clear.
Kisame - Mission `Akatsuki kara no shisha` Jounin rank clear.
Zabuza - Win special survival 100 times.