Some players tend to have trouble with this boss mainly because of his massive power on attacks. Basically, he's equipped with a gigantic electric gun, that shoots out blasts of electrical charges in small intervals. What you should do is keep distance between him and yourself. Keep running in circles, but DO NOT jump (makes you an easier target). You can try rolling, but keep running in circles until he fires about 5 laser blasts. Suddenly, his gun will discharge, and it'll be jammed for a few seconds. Quickly sprint in, and lay down a few power slashes. If you want, you can also cast Ninpo magic to assist in causing more damage. Just repeat this strategy, and keep retreating/approaching. If you stay close too long, he'll grab you, and shoot you point blank with the weapon. Also, try to keep several potions on hand when facing him. You might take a few hard hits along the way. Aside from that though, he's not as challenging when compared to other bosses faced.