Apparantly Shiegru Myiamoto loved having them in there for the race against time. In example, the Shadow Temple. On the Boat of Time, you were forced to fight four stalfos and manage to get off before falling into an endless abyss. And in Ganon's Crumbling Tower, you had even less time! You had only about fourty five seconds if you wanted to make it out safely. Hey, those guys made me leave the castle with three seconds on the clock! The Forest Temple was full of 'em. There were at least six of them in the temple, along with a good 3 in the Shadow Temple.