Daikuu Maryuu Gaiking

A boy, Tsuwabuki Daiya found a black fire in an ocean when he and his father were in a small boat. A big monster came out of the fire, and the father and the crews were disappeared into the sea. When he was about to become the next victim, a large mecka dragon appeared and saved him. 5 years later since then, Daiya becomes a junior high school student. A big monster reappear, and he meets the mecha dragon, "Daiku Maryu". The head of the dragon separates from the body, and it turns into the body of a super robot, Gaiking. He gets in Gaiking, fights against the monster, and beats it. He learns that there is an enemy that plots to conquer the world, and he leaves for another world, Darius, to stop the plot.

This story chronicles the crew of the transformable carrier Daik? Mary? and the Super Robot Gaiking's battle against an invading race of aliens called the Dark Horror Army, whose home planet is facing destruction by a black hole. Notable aspects of the series include the dinosaur-based designs of the Daik? Mary? and its support machines and the use of part of the carrier to form the main robot. The Gaiking robot is helmed by former baseball star Sanshiro Tsuwabuki, whose latent psychic powers make him the only one capable of piloting the giant robot.