my only problems were kakuzu and sasuke vs killa bee.
for kakuzu it took me a while how to beat his cheating ass, everytime he got hurt he'd hop back on those damn trees.
and the sasuke vs killa bee.... it was a crappy fight, it should have been like pain vs naruto where they had the button mashing scenes and avoiding attacks and stuff like that, plus Where the F*** was taka? suigetsu, jugo, and karin were all there backing sasuke up in the anime but in the game they didnt even through them in to help you out. plus they didnt even take the time to make the map from the anime for their fight. i hated how killa bee got to enter 8tails mode and was OP and sasuke didnt even have support nor did his ultimate work that defeated killa bee in the anime. at the very least they should have had a button mashing finish to killa bee,hit him with amterasu full power mashing the button, avoid the tenticles, karin is about to get hit by one... chidori spear(saves karin) karin gets hit with the tenticle, turn off the amaterasu, and have jugo get karin. then thats it.... that would have been perfect for it.