Doublas M2 was a massive Mechanical Beast from the origonal Mazinger Z manga and anime. It was sent alongside another Mechanical Beast called Garuda K7 by Dr. Hell and Baron Ashura to destroy Japan's Photon Power Labratory. They both wreak Tokyo on their journey to the Photon Power Labratory, before getting there however the Mazinger Z and Aphrodite A come down to stop them and the two Mechanical Beasts are quickly destroyed.
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