The Dragosaurus, a mysterious prehistoric animal, surviving unknowingly in the depths of the oceans, seeds panic by devouring huge quantities of oil around the planet, until it starts to
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The Dragosaurus, a mysterious prehistoric animal, surviving unknowingly in the depths of the oceans, seeds panic by devouring huge quantities of oil around the planet, until it starts to head for Tokyo. However, despite this Japan has some aces in his sleeves: Grendizer, Great Mazinger and Getter Robo G, which are immediately sent to stop the monstrous animal. Unfortunately, the awkward Boss Borot joins the team and ends up being swallowed by the Dragosaurus rendering all more difficult. Boss Borot eventually manages to escape the creature's stomach thanks to Great Mazinger. As the three super robots try to fight off Dragonsaurus the animal makes its way to Tokyo and goes on a rampage. Dragonaurus is eventually killed off after Getter Robo G uses the Shine Spark to ignite the large quantities of oil in its body, saving the city.
