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Naruto: Ultimate Ninja 2

Uchiha Itachi
Complete Kakashi Gaiden.

More Characters
Sasuke: Complete story mode twice.

Kakashi Gaiden Story: Complete all in-game missions.

Itachi: Complete the Kakashi Gaiden.

Kisame: Complete the Kakashi Gaiden.

Temari: Complete story mode twice, and complete all thirty-five missions and survival missions.