Great Mazinger tai Getter Robo

Synopsis

A colossal space monster named Gilgilgan emerges from the depths of the universe to attack Earth. The Science Fortress Laboratory and the Saotome Institute each take up the fight against this menace. Their mutual rivalry causes Getter Robo and Great Mazinger to be driven back by Gilgilgan's fearsome fangs, yet once they set aside their differences and join forces, they launch a coordinated assault!