How do you get anbu Kakashi in Naruto clash of ninja revolution 3?

First, complete 40% of Kakashi's missions (including the last one), and 20% of everyone else's missions. (You can check the percentages at the rankings.) Then do Kakashi's final mission again, and you should battle Anbu Kakashi instead of Guy. After beating him, go to the shop & buy him for 100,000 ryo.

Also, I had to get genin on kakashi's s-rank, apprentice would not work