Mechani-Kong's name comes from the word "mechanical" and the "Kong" part of King Kong's name.
Mechani-Kong was both designed and built by the international criminal, Dr. Hu, to mine the radioactive Element X from the Arctic underground, but the robotic ape failed his creator, the radiation of Element X damaging his controls. However, Dr. Hu came up with another plan to abduct the real King Kong and using Mechani-Kong, hypnotize Kong to mine Element X instead. However, the combination of Kong’s mind and the cries of Nurse Susan Watson, who Kong had a liking for, were able to overcome the hypnotism and Kong escaped to Tokyo, with both Mechani-Kong and Dr. Hu in hot pursuit.
In Tokyo, King Kong and Mechani-Kong battled up the side of Tokyo Tower, both monsters getting their shots in on one another. In the end, an attack back on Dr. Hu's ship crippled Mechani-Kong's controls and turned the tide of battle in Kong's favor. The crippled Mechani-Kong then fell from the tower, crashing into the street below and shattering into several pieces.
- Hypnotic light emitted from head
- Grenades on waist
- Super strength
- High Beam eyes
ComicsMechaGodzilla III under the control of Doctor Oniyama to fight Godzilla in the Kodansya Godzilla manga, but both failed.
- Main article: Gallery:Mechani-Kong.
- In an episode of The Grim Adventures of Billy and Mandy titled "Giant Billy And Mandy All-Out Attack," there was a parody of Mechani-Kong with Mandy piloting the robot.
- According to Koichi Kawakita at the Godzilla Birth Festival 2010 on November in the Ginza district of Tokyo, Japan, Mechani-Kong was supposed to appear in a scrapped Godzilla vs. Mechani-Kong film in the Heisei series.