Goronko S2 has a different paint-job than he did in the original Toei anime. His ball body and helmet are now green and has a mouth guard. While it did not have much screen time, it was seen wielding a sword which it would have used in combat.
Goronko appears in a burning blaze along with his commander and Mechanical Beast breathen. They terrorize the city with the Army doing little to stop them. After a black fist punch through Grossam X2 and Bazin B9 they all stopped. Mazinger Z and Koji had come to challenge them to save the city. After Z kills four of them he was bound by another mechanical beast. Goronko and a partner roll into action, ramming Mazinger Z. However after a mysterious lighting zapped Goronko with his friend, that was the end of his legacy.