Board Thread:Versus Debates/@comment-26537507-20160303180010/@comment-9782468-20160305033542

@MlGShinobi, that battle kind of nerfed Kakashi in order to showcase Sasuke's and Naruto's development. In their second fight, Kakashi would have killed Zabuza one on one if Haku hadn't interfered, and he definitely would have killed him after he accidentally killed Haku.

And then during the 4th Shinobi World War, he took them out by himself without much issue at all, and this is during the day that he was fighting people like The Seven Swordsmen of the Mist.