Iron Mask

An enemy that somewhat resembles a Helmasaur. It wears a mask of iron to protect its vulnerable body, and can easily overtake a would-be hero if encountered in large numbers. Like the Helmasaur, its back side is unprotected by its mask, so a weapon like a sword hitting its backside will result in quick death.

-In Link's Awakening the Hookshot could be used to pull the mask off of the creature, rendering it incredibly easy to kill without its main defense.

-In Oracle of Ages this same thing could be done with the Switch Hook and Long Hook.

-In Oracle of Seasons magnetic disruptions from the Magnetic Gloves could also rip     the mask off the creature.