To beat the first boss in the dark world, use the hammer to crack the mask. then hit it 
with the sword over and over. you might want a few faries.
Submitted by htrekcor

This is how beat the second boss in the darkworld.First you have to use your hookshot to 
pull of the puffballs and destroy  thoose then when there is only a jellyfish left he'll 
sart going really fast in the water.So use your sword to do the spin move and try to hit 
him.
Submitted by wildboy1201