Gleerok

The Gleerok appears in The Legend of Zelda: The Minish Cap. He is the boss in the second dungeon, known as Cave of Flames. The Gleerok appears in a pull of lava, making it almost imposible to hit his one weak spot, his back. To defeat the Gleerok use the Cane of Pacci on his back. This will stun him long enough to run accross his neck and hit the center of his back with your sword a few times. each time you do this though the Gleerok gets angrier. He shoots more and more flames at link. If your low on health stay in one corner and use the Gust Jar to extinguish the flames around you. the gleerok can not hit you in the corner and the flames will often provide extra hearts. After being hit the gleerok will also try to get you by expanding his lava pool. To dodge this just saty on the outside corners. Upon his defeat link gains the Fire Element and a Full Heart Container.

Quote from The Legend of Zelda: The Minish Cap Gleerok figurine:

"Appears in the Cave of Flames. A gleerok with a hard, Rocky shell found in Mount Crenel. Hiding in lava, this beast spews fire on everything it sees."