Your suppose to use your iron boots and when hes beggining to roll over you your suppose
to hold a and he will get stunned and attack him

When i ment "a" i meant the A button

I was asking the question for my ten year old little brother, thank you very much.

ur suppose to be near the edge not all the way and when he comes up to u and gets ready to
attack u use ur sword to get him to curl up into a ball he will start rolling at u and u
then press the a button to grab on to him and u end up automatticly throw him over the
edge when he is over the edge quikly take off the iron boots and run over to the other
side and put them back on 3 or 4 times until it shows u him bouncing up and down on the
lava and him getting back on the plat form he will then let u pass