he should learn some new ones too, so we don't have to see 4 tail naruto all the time. it really pisses me off when that happenes. the constant transformations are making the series boring. they should go back to the ninja stuff again, although I must say I'm loving it how naruto if had given more time would of killed oro. he doesn't know any genjutsu. instead of going all crazy he can use the power as an extra power source for difficult jutsus that need a lot of chakra. I love genjutsu and naruto can do some crazy damage with it with his kyuubi chakra.