Mycenae Empire (ZERO)

The Mycenae Empire are principle antagonists in Shin Mazinger ZERO vs. Great General of Darkness. Their origins are very similar to that of their other depictions in Mazinger media but with one key difference; Though they are lead by The Emperor of Darkness, the evil emperor is in fact Dr. Hell after he was time slipped 10,000 years into the past by the photon force beam of Mazinger Z, thus creating a time loop.

History
After some time passed since Dr. Hell's defeat at the hands of Mazinger Z, the era of peace brought about by the final battle was cut short when the Mycenae Empire made their presence known by destroying most of the worlds super robots and severely damaging Mazinger Z and severely injuring Koji Kabuto. After he is repaired as a cyborg, he had set out to find his father who had foreseen this invasion from a multiversial veil. As he was searching for answers, the second in command of the Empire, Ankoku Daishogun, had wiped out the entire Photon Laboratory leaving Koji and the newly discovered Tetsuya Tsurugi and Great Mazinger to face the insurmountable enemy.