Mechagodzilla

Mechagodzilla (Japanese: メカゴジラ, Hepburn: Mekagojira) is a fictional mecha kaiju reccuringly appearing in the Godzilla series. It is robot built in the likeness of Godzilla, and is controlled by either artificial or telepathic intelligence depending on the incarnation.

Mechagodzilla first appeared in the 1974 film Godzilla vs. Mechagodzilla and increase in popularity has led to it since becoming an arch-enemy of Godzilla along with King Ghidorah, who both have a record 7-film appearances as an opponent of Godzilla.

Showa
Mechagodzilla is the final antagonist of the Showa series. In Godzilla vs. Mechagodzilla, it was the centrepiece of the villainous Black Hole Planet 3 Aliens' invasion of Earth. It first sighted on Mount Fuji disguised as Godzilla, known as Fake Godzilla and battles and defeats Anguirus who at the time was allied to Godzilla. When attacking Tokyo, it is confronted by the real Godzilla, where it sheds its skin to reveal its true-self. Godzilla wins the fights but Mechagodzilla is quickly repaired and now against King Caesar, is defeated again by Godzilla by decapitating it.

In Terror of Mechagodzilla (1975), set a year after the first film, Mechagodzilla is again repaired to continue fighting without its head. In wake of reparation as Mechagodzilla 2, the deranged scientist Shinzo Mafune, who helps the Black Hole Planet 3 Aliens, takes the control of the peaceful Titanosaurus to invade Tokyo, before Godzilla returns to fight and defeat both.

Heisei
Mechagodzilla next appears in Godzilla vs. Mechagodzilla II (1993), although this film does not share continuity with the Showa films. This Mechagodzilla is built from the remains of Mecha-King Ghidorah, which was built from the corpse of King Ghidorah.