Dr. Hell launches a full-scale assault on the Photon Power Lab, using the Ghost Mechanical Beast Drago Omega 1 to infect Venus A and turn it against them. His attack is followed up by a ground assault that successfully captures Kouji and the others. Boss and Boss Borot distract the enemy long enough for Kouji to reach and activate Mazinkaiser, but shortly thereafter Kouji is taken by surprise by the Combined Mechanical Beast (Gattai Kikaijuu), Garadabura MK01. Unable to effectively combat the flight-capable Mechanical Beast, Kouji and Mazinkaiser are dumped into an active Mount Fuji.