Successfully complete the game, then go to Kakashi's house. Talk to Kakashi and Guy. Place Kakashi in your party. Then go to Konohamaru and use the password to unlock Guy. You will now have both Kakashi and Guy.
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Go to the Ninja school in the main town and talk to Konohamaru. A touchscreen password system will appear, consisting of twelve square areas arranged in a grid with Japanese characters. Assume the areas are assigned to numbers on touchscreen as follows:

After entering a password you will receive an item that will unlock a character or item.

Kankuro: 1, 12, 10, 11, 2, 5, 4, 7

Temari: 8, 6, 9, 3, 12, 11, 2, 7

Third Hokage: 3, 7, 8, 1, 10, 2, 5, 12

Garra: 4, 11, 6, 9, 1, 2, 10, 12

Guy: 9, 11, 1, 7, 4, 5, 6, 12

Iruka: 10, 7, 4, 12, 11, 1, 9, 2

Itachi: 7, 2, 5, 9, 4, 1, 12, 6

Jiraiya: 5, 2, 10, 4, 1, 7, 6, 12

Kyuubi naruto: 7, 10, 8, 12, 2, 6, 4, 5

Orochimaru: 1, 8, 6, 2, 12, 5, 10, 7

Kisame: 11, 1, 7, 2, 8, 12, 6, 4

"An Extreme Battle!" mission: 8, 12, 2, 1, 11, 7, 3, 4

"The Legendary Haze Ninja!" mission: 6, 7, 5, 8, 9, 4, 1, 12

"The Legendary Sannin!" mission: 2, 3, 5, 7, 11, 6, 8, 12

Successfully complete the game.

Get a "Jounin" rank clear in Ibiki's mission, Saigo no Uchiha Zoku.

Win Special Survival 100 times in Ibiki's mission,