Gleerok

The Gleerok is the guardian of the Cave of Flames high atop Mount Crenel in The Minish Cap. Defeating involves firing the Cane of Pacci at it's back, and then slashing with your sword when rendered unconscious.

Quote from The Legend of Zelda: The Minish Cap Gleerok figurine: "Appears in the Cave of Flames. A Gleeok with a hard, rocky shell found in Mount Crenel. Hiding in lava, this beast spews fire on everything it sees."