Johnny Sokko and His Flying Robot: 23 - Dr. Eingali-Master of Evil

Johnny Sokko is the only one who can control Giant Robo with a controller disguised as an ordinary wrist watch. One day, he receives a parcel from his father as a birthday gift; it is a kit for constructing a child-sized robot. However, the "gift" is not all that it seems to be. It turns out to be an android duplicate of Johnny, created by Emperor Guillotine's new accomplice, Dr. Germa (called Dr. Eingali in the American version), to steal his controller and turn Giant Robo against Earth.