From Zelda Legends Wiki
A gaint Stalchild sleeping in the back of Ikana Graveyard. Use the Sonata of Awakening to wake him, and he will start running away. If he runs all the way to the end, you must re-enter the area, and try again. When he runs past two metal structures, he'll summon fire, and you must defeat two Stachilds to put it out. To stop him from running, slow him down with arrows, run up, slash him with your sword, and the battle begins. His attack can be blocked by your shield. Just keep running up and slashing him. Eventually, he'll disappear. He'll pound where you where, so just move around. Repeat avoiding and attacking untill he surrenders.