A mysterious girl called Akina, who is actually Dr Coy's daughter, arrives with her robot, Fighter. He is an expert at Chinese-style kung-fu, and absolutely loathes Dr Coy. But before he can challenge Dr Coy, he must defeat the Chubby Brothers' robots. After Fighter has beaten their robots, The Blade and Hell Tank, he issues a direct challenge to Dr Coy. But Dr Coy insists that he beat Zeus first. So Fighter and Zeus fight it out until Zeus prevails.

Dr Coy's then however insists that Zeus fight his robot King before he will agree to fix Zeus. The two robots clash and eventually Zeus wins when King loses one of his robot arms. Dr Coy keeps his word, and pledges himself to Megan's cause.