Gorosaurus

Gorosaurus is a dinosaur kaiju. He is an enemy of King Kong and an ally of Godzilla.

King Kong Escapes
Gorosaurus was a dinosaur that lived on Mondo Island. He encountered Susan Watson and tried to eat her, but King Kong attacked him and saved her. Gorosaurus used his Kangaroo Kick multiple times on Kong, but he was defeated when Kong broke his jaw.

Destroy All Monsters
Gorosaurus was one of the monsters controlled by the Kilaaks, and under their control he was sent to attack Paris. He was then recalled to Mount Fuji, but he was finally released from his mind control and helped to defeat King Ghidorah.

He also appears in the TV series Godzilla Island and ''Go! Godman''.

Trivia

 * Kong's battle with Gorosaurus is clearly inspired by the famous battle between King Kong and the Allosaurus/Tyrannosaurus in the 1933 film King Kong. Both battles end with Kong beats his opponent by breaking his jaw.
 * There is a real dinosaur with a similar name,.