In Terror of Mechagodzilla, the MekaGyakushuGoji's name comes from the film's Japanese title, specifically Mekagojira and gyakushū (メカゴジラ and 逆襲?), meaning Mechagodzilla and counterattack, respectively, and Goji, which comes from Godzilla's Japanese name, Gojira (ゴジラ?).
The MegaroGoji had a plain, streamlined body, a short neck and silver, puffy, pillow-like designed dorsal spines. The face looks more friendly than usual, with a rounded muzzle, oversized brows and huge eyes. The eyes of the MegaroGoji were movable and had movable eyelids. Compared to other Godzilla designs, this suit also has an more upright stance than previous suits, a characteristic that would be kept for the Godzilla suits made in the Heisei era.
In Godzilla vs. Mechagodzilla, the MegaroGoji suit was mostly the same but with some changes to the face; more detail in the muzzle and the brows were reduced, making this Godzilla suit look less playful than in the previous movie, Godzilla vs. Megalon. The eyes did not move, nor have movable eyelids. This suit is also called the MekaGoji (メカゴジ?). A second suit was made for Mechagodzilla's Fake Godzilla disguise.
In Terror of Mechagodzilla, the MegaroGoji received a further face lift; the muzzle was reduced and given more detail, the height of the brows are lowered and the eyes were reduced, thus giving the face a semi-comical and semi-mean look. The eyes did not move nor have movable lids, and the rest of the body is unchanged. This suit is also called the MekaGyakushuGoji (メカ逆襲ゴジ?).
- The MegaroGoji is the only Godzilla suit to have been played by a different actor in every one of its film appearances.
- The MegaroGoji was one of two suits used to portray Mechagodzilla's Fake Godzilla disguise in Godzilla vs. Mechagodzilla. Fake Godzilla was primarily portrayed using a separate Godzilla suit that bore noticeable physical differences from the MegaroGoji, however the MegaroGoji itself was used for Fake Godzilla's rampage around Mount Fuji and its battle with Anguirus prior to the metal being exposed on its arm, as well as in close-ups. The Fake Godzilla suit was later used as a stand-in for the MegaroGoji in the final scene of Terror of Mechagodzilla when Godzilla wades out to sea.