Dorigon

Dorigon, the second monster fought by the hero, FIREMAN

History
Dorigon, along with his blue colored brother, Dorigus, were sleeping at the bottom of the sea, until a nuclear explosion awoke them. Dorigus surfaced first, but the one horned dinosaur monster was instantly killed by the JSDF. Enraged, Dorigon surfaced and began to assault the earth, gaining the attention of Go who transformed into Fireman! The two titans clashed, exchanging blows and beams, with Dorigon even gaining the upper hand at one point. But after breaking the ceratops' weapons, the horns, from it skull, Fireman delivered his finisher, Fire Beam, and destroyed the monster.

Trivia:
 * Dorigon's design pays homage to the Toho Monster Baragon.