Zelda: Ocarina Of Time Master Quest Part 45: Doppelganger

Shadow Link... is much harder than I remember him to be, lol! I found the best method is NOT to Z/L target him and just spam horizontal or forward thrusts with your sword to hit him. Din's Fire works as well for really cheap hits. The Megaton Hammer would work too as well, though I can't seem to land a hit with it as he puts up his shield...

Enjoy!