There is no official for the PlayStation 2. The series officially ended on that console with Naruto Shippuden: Ultimate Ninja 5 in 2009.
: If you want the official final game, search for the Naruto Shippuden: Ultimate Ninja 5 (Europe) (En,Fr,De,It,Es) ISO. This version contains full English menus and text. How to Play the ISO on Modern Hardware Download Game Ps2 Iso Naruto Shippuden Ultimate Ninja 6