Wojigairon

The Wojigairon (ウォージーガイロン) is a giant quadrupedal dinosaur-like Reaverbot from Mega Man Legends 2. It is the boss of the Saul Kada Ruins. When Mega Man first encounters it, it is invincible as it can recover its health by drinking the lava in his room, and can only be defeated by turning off the lava with the help of the Bonnes. It attacks with a shockwave, electric rings, a swat, fire breath, lava rocks, and small fireballs. A Wojigairon also appear in the Mother Zone of Elysium.

Trivia

 * Wojigairon's appearance and part of its name, "Gairon", is possibly derived from Guiron (ギロン Giron), a monster from the movie Gamera vs. Guiron.