Well, Ganondrof would have to respawn a lot, but probably not nearly as often as some of the more common monsters... but personally I thought those mummy things were worse than ganon or granondrof. Ganondrof you just hit his shiney light ball back to him, he just wants to play pass! Just make sure that when you accidently knock him on the head with the ball, you be a good old sport and go over and see how he is doing, and if no cure seems possible, put him out of his misery. And Ganon, you jsut rolled between his legs and smacked his grundle (new word for you kiddies) with a big as hammer until he died.
Those mummy things though, if you didn't have the sun song, you were SCREWED, literally! They like jump on your head and hump ya to death. I swear, the first time I played Ocarina of Time and I became adult link and walked outside the temple, it was a freaking orgy of death!