There are some ways to get him ..

1st, the easy way, recharge and buy Jonin Medal and you will get the 2stars Naruto Nine Tails Chakra ninja, buy his frags from events and upgrade his stars to 3 or 4 i forgot ..

or

2nd, the f2p way which is a good-luck-if-you-are-still-playing way, wait for 1 to 3 frags per year from Chase Missions and collect other ninja fragments for refinement and take the 10k pointer to get his frags ..