(posted: 6/11/2007 8:41:12 AM) Answer Courtesy of Eternal Infernal:
Dark Link is quite difficult because he keeps reincarnating, but stick at it, just keep your shield ready and strike him there are two quite easier ways:
1. Dark Link will copy whatever you do with your sword, so before you strike him, put the hammer into a C position and strike him, seeing as he has no hammer he can't copy you.
2. Before the Water Temple, go through the series of events that bring you the Big Gorons sword, be careful though this sword is so big that you have to use 2 hands so you can't shield yourself, but it gets the job done quicker.