If you want a fast fighter and someone with good jutsu then chose neji. He is fast using the gentile fist and when you get your ultimate on your opponent he gets the bekugan.

Step 1) At the start of the match, run under the creature's head.
Step 2) Press double X to do the dash up to the enemy's head
Step 3) Keep pressing O to do air melee attacks right under your opponent
Final step) Repeat process. If you can do the trick fast enough, you can beat the summoner without getting a single hit and a win!

Hope that helps

Ok, In order to beat someone in 9 or less seconds(If you've been playing for a while you should know how to do it) you have to immediately go into berserk mode and relentlessly attack. Dont let your guard down for one moment(unless you can't help it) once their life is about half way down collect chakra until you can use your ultimate jutsu. After you use it you should go into a special mode(ill write on this later) and then you do the same as before. Attack, attack, attack!!! Oh and you have to be at least a level 8 to do this. I have done this. And you get sooooooooooo many rewards for it. Well got 2 run. Hope I helped all you first timers out there.

You have to beat heros history and ultimate contest. Go to ultimate contest and go to the academy and talk to moegi and udon, they will challenge you to a trivia contest, once you win, go to the resturant nexto ichiraku, and ebisu will be there. Talk to him, you will be challenged to another trivia contest. After you win you will unlock the 1st and 2nd hokages. Then you have to go to the man nexto ichiraku, who sells items and buy everything he has. Now walk around, go to the blue dots (BLUE dots, not green or any other color) on your map and talk to people. You will give these people the items and "go on dates" with them (girls), and just eat or talk with guys (in my case it was sakura first). You have to go to the center of the leaf village (thats were most of the people will end up being) traning field, forest of death, and hotsprings, to find people that you will date, then go back to the center of the village to date them. Keep doing this (you will go on ALOT of dates and it will take alot of time), eventually one of the people you meet is Hanabi, you will talk to her once, talk to her again and give her some money, then talk to her again and go on a date with her. After that you will have unlocked hanabi. After you unlock her it says congratulations you have unlocked all 41 chracters!!, as a reward we give you the "yellow flash" (4th hokage). And thats it!!