Several characters from the Mazinger franchise appear in Violence Jack including a human version of Mazinger Z named Jim Mazinger and Koji Kabuto as a child. They also have a story arc dedicated to them called Castle of Iron in the form of a karate training genre along with other characters from the series like child versions of Sayaka and Boss, Aphrodite A as a woman with an Afro, Diana as a part African woman with blonde hair, and even Kenzo Kabuto. The main conflict is a turf war between these characters and Count Brocken before they face off against the second generation Kikaido Karate user, Dr. Hell who had assassinated Koji's grandfather Juzo Kabuto.
Aila Mu from God Mazinger appears as a semi-recurring character, appearing as a model who recently became leader of a community of women that were under pressure by two other communities. They get help from Jack to escape from the underground complex they were trapped in.
Tetsuya and Jun were also featured as major characters. Tetsuya was killed by the biker gang Hell's Wind after they topple his car prior to the coming tragedy. Jun (bearing her TV Magazine manga appearance) survives the ordeal and vows to hunt down the biker gang to avenge Tetsuya, coming into contact with Jack.
Violence Jack in Mazinger Edit
The Kurogane House features characters from Gakuen Taikutsu that play a large role in Violence Jack. Tsubasa Nishikiori is among them, who later appears in Shin Mazinger Shogeki! Z Hen as the mother of Koji and Shiro Kabuto and a former collaborator of Dr. Hell.
The Mazinkaiser SKL OVA features a plot similar to the Evil Town arc of Violence Jack, three armies that want dominance over each other (one even being lead by Aila) and the SKL's role taking a parallel to Jack.