Planetary Robot Danguard Ace vs. the Army of Insect Robots

Movie Version of Dangard Ace.

In order to explore the newly discovered planet, Promethe, there are many projects are running all over the world. Here in Japan, under the direction of Dr. Oedo, "Space Carrier Jasdum" and "Planet Robot Dangard A" are being built. Ichimonji Takuma is a candidate for the pilot of Dangard A. His father, Ichimonji Dantetsu, was a famous space pilot. However, Dantetsu went missing after a mysterious accident, and the people blamed him for the accident. In order to clear his name, Takuma is trying to become a space pilot and succeed in the project. Will Takuma become the pilot?

Alien invaders take over Great Mazinger who is at the entrance of a museum next to Mazinger Z as symbols of peace. Grendizer fights the evil invaders and Great Mazinger is recovered. When the Vegan empire dispatches a new general to oversee the takeover of Earth, he quickly manages to capture Koji Kabuto and, learning of Great Mazinger through interrogation, quickly commandeers it from a museum where it was kept as a symbol of peace. It is now up to Duke Fleed aboard Grendizer to stop humanity's former defender from becoming its destroyer.

The Doron Empire from the Ganymede System discovered Earth as an ideal world for them to conquer. The interest of expanding the empire came as a result of the power-hungry General Ozmel who overthrew the current reigning Queen Medusa of the Ganymede System as a start of their universal conquest. Almost completely succumbed to the empire, Earth is at its last days, and one scientist, Dr. Shikishima, had only one hope in restoring Earth from its alien conquerors--- a massive mecha known as the Mechander Robo, specially programmed and designed to battle these invading aliens from complete takeover of Earth. Along with this awesome fighter machine, Dr. Shikishima also recruited three pilots to be placed behind the Mechander Robo's controls--- the mysterious Jimmy Orion, the scientist's son Ryosuke Shikishima, and Kojiro Hachijima. Although the primary storyline is Earth battling the Doron Empire, there is something within lead pliot Jimmy Orion's past that was somewhat connected towards the entire storyline.