You know the first boss Ebisu and Konahamaru? Well if you are using Naruto then you can beat them in 3 secs, charge sexy jutsu until the bar is yellow, then let go to do Harem no Jutsu, where you clone yourself and turn you and your clones into sexy women with bikinis. Ebisu will die instantly and you win the fight (not that it's hard) Alright, next is Kankuro. Again, this is only if you are using Naruto (although I prefer Sasuke and Kakashi as playable characters.) What you have to do is charge your jutsu bar until you get to Naruto Barrage. Don't go into the yellow when you get to Naruto Barrage, stop when the bar is still red. This will cause him to fart, and then he'll paralyze Kankuro and follow up with the attack that he would have done if you had charged Naruto barrage until it hit yellow. Now for Zabuza. Okay, you have to be using Kakashi to do this, chargwe your jutsu bar up until you get to his third jutsu called summoning jutsu. Make sure that this time you charge until the bar is yellow, then let go to unleash the dogs on Zabuza. Now, just like in the manga, he will do that lightning thing on Zabuza. Just keep doing that until he dies. Now for the Kakashi secret, which is how to unlock him. The thing is, you have to beat the game with both Naruto and Sasuke, but make sure that you do it all on one save file. Then you will have Kakashi available as a playable character in story mode.