Godzilla vs. Mechagodzilla was released in the year 1974。Godzilla vs. Mechagodzilla is also called as Gojira tai Mekagojira, Godzilla a Mechagodzilla ellen, Godzilla contra Cibergodzilla, máquina de destrucción, Godzilla contre Mecanik Monster, Godzilla contro i robot, Godzilla vs. Bionic Monster, Godzilla vs. Cosmic Monster, Invasion från Applaneten。

Aliens intend to take over the planet and, just in case Godzilla tries to interfere, have built a mechanical version of him to put an end to his interference. The Earth humans summon the legendary King Seesar to assist Godzilla in the battle.