Kouji gradually learns to how to control Mazinger Z, while Baron Ashura quakes in fear and rage at the robot who he/she believes to be Zeus (a being who "betrayed" his/her race, the Myceneans, thousands of years ago). After destroying Ashura's Talos with a devastating Rocket Punch, Baron Ashura vows to take revenge against "Zeus" by sending out two of its most powerful robots : Garada K7 and Doublas M2.
Kouji faces off against Garada K7, still struggling to use the controls. Meanwhile, Detective Ankokuji and Juuzou both attempt to flee from Ashura's troops, all while Juuzou suffers from a serious injury. As Kouji begins to move his fight with Garada K7 into the town of Atami, he manages to knock the mechanical beast into a building, only to see a horrific site: The blood of individuals who were crushed under the rubble. Traumatized and afraid of causing more casualties, Kouji attempts to fire a Rocket Punch, only for it to be deflected. Meanwhile, as Juuzou and Ankokuji are surrounded by Ashura's troops, Juuzou manages to enter a shrine (where Boss and his lackeys are hiding) in order to activate a remote control system, sending the giant fist out to catch both he and Ankokuji, returning them to Kouji and Shiro in Mazinger Z's cockpit.
As the battle with Garada K7 continues, Juuzou shows Kouji how to use the devastating "Rust Hurricane" attack, destroying Garada K7 instantly. Ashura then sends out Doubla M2, who begins to use Photon Energy attacks upon Mazinger Z. The attacks fail, however, as Mazinger Z is revealed to have been made from Super Alloy Z, allowing him to absorb the blast. Juuzou then teaches Kouji one last attack: The deadly "Breast Fire" technique, destroying Doublas with a blast of energy. Kouji, Shiro, and Ankokuji's rejoicing is short lived, however, as Juuzou dies moments afterwords. Infuriated, Kouji chases down Ashura in the Mazinger, grabbing him and nearly crushing him, before Sayaka and her comrades arrive to try and calm Kouji down. Ashura then escapes Mazinger's grasp, causing Kouji to let loose another Breast Fire attack, which Sayaka blocks using Aphrodai A. As Sayaka, and her father, Prof. Yumi, help Kouji to calm down, the plane carrying Prof.