I'm playing OoT

use the broken knife. stab him. he tries to jump onto the blade and misses.

or, how i did, was corner him. he mimics your movements right? move to where he will back himself into a wall, then strike. he tries to dodge and avoid but cant move to do so.
-hasnt played Zelda in ages-

Yeah, I've tried corning him many times. All he does is shield and backflip, even if he can't actually go anywhere. He stays 100% godmode all of the time. :S