Gouen

Great Flame is the boss of Death Mountain in Four Swords. It is a ball of fire similar to Hot Head from Link's Awakening. Great Flame is practically invincible when he is fully covered in flames. He attacked the heroes with balls of colored fire.

If the Link of the same color hit the ball of fire, it would be reflected back at the monster. When the ball of fire makes contact with him, his flames diminished. He then became vulnerable to the heroes' swords. After several attacks the monster is defeated.

Trivia
Hot Head, the boss of Turtle Rock in Link's Awakening, has its Japanese name (Degu Fureimu) made of the words "Degu", a made-up adjective that basically means "Big" or "Great" in the Zelda series, and "Flame". Thus, its Japanese name could be translated to as "Great Flame". It should be noted that although both have a similar appearance, Hot Head's name is generally written using katakana, while Great Flame's is only find written with kanji.