Juzo Kabuto (Kouji's grandfather), who secretly works in an underground laboratory, managed to finish the final version of Great Mazinger. With a tremendous power compared to the prototype version, Tetsuya asked Kouji to confront Dr. Hell in Bardos Island. Kouji, without knowing the true Shin Great Mazinger, was worried and asked Tetsuya if he can handle an entire army of super robots. However, having the confidence with Shin Great Mazinger, Tetusya scolds Kouji of his cockiness. Therefore, Kouji flies off to fight Dr. Hell leaving Tetsuya against an entire army of mechanical beasts. Consequently, Shin Great Mazinger defeated the entire army of Doctor Hell including the possessed Venus Ace (although most of the battle was not shown). After the battle without damage, Great Mazinger decided to find and help Kouji in the Floating Fortress of Dr. Hell. The concept of Shin Great Mazinger is to bring Great Mazinger to the ranks of modern and more powerful robots such as Mazinkaiser and Shin Getter Robo. List of episodes Episode 1: A Fierce Fight! Double Mazingers: Baron Ashura attacks Japan with an army of Mechanical Beasts, but is met head on by Kouji Kabuto and Mazinger Z. Ashura's forces manage to get the upper hand, and despite the arrival of Great Mazinger, Boss Borot and Aphrodite A, Mazinger Z is disabled and Kouji hurled to parts unknown. Dr. Hell quickly modifies Mazinger Z into the Ashura Mazinger and launches an attack on the Photon Power Lab. Despite Great being damaged, Tetsuya Tsurugi attempts a valiant defense but is overwhelmed. Before he can be killed by a gloating Ashura, a mystery robot wipes out the entire attacking Mechanical Beast army with one shot. Overpowering Ashura Mazinger easily, the mystery robot begins attacking the Lab and Great! Episode 2: A Descending, Malevolent Deity: Great Mazinger attempts to battle the mystery robot, but is easily swept aside. Just as the machine begins to power up its heat sinks, Sayaka arrives and begs the pilot to stop. Kouji later awakens in bed, having little recollection of piloting Mazinkaiser to the rescue and attacking the lab himself. He describes how he was brought to a cave he found Mazinkaiser, the final creation of his grandfather. Unfortunately, Mazinkaiser taps into the pilot's mind and is so powerful Kouji is overwhelmed and unable to use its power effectively, or even safely. Because of this, when Ashura uses the aerial