How do you unlock kyuubi Naruto in Naruto path of the ninja 2?

you can use an action replay code to get all the characters or you go to the summon sheet put in a code to grt a misson called Extreme Battle where you fight nine tailed naruto(kyuubi naruto) and sasuke in his second form and if you win you get the nine tailed spirit so naruto can turn in to kyuubi naruto in battle.