Toho Godzilla Suit 8

Megaro (1974)

Godzilla battles his robot double to prevent destruction of the Earth!
This suit can be seen in these movies:

For Godzilla vs Mechagodzilla, the Megaro-Godzilla was the same but with some changes to the face.

More detail was added in the muzzle and reduction of the brows, making Godzilla look less playful than in the previous movie. The eyes did not move, nor have movable eyelids. This suit is also called the Mekagoji. 

A second Godzilla costume, a publicity suit never intended for use in a feature movie, was also used in Cosmic Monster.

The jaw and eyes were immobile, while the suit boasted a toothy grin complete with fangs. It was used when the disguised Mechagodzilla battles Angilas and during the clash with the real Godzilla at the oil refmery. It was also used for a special scene in the Japanese theatrical trailer for Cosmic Monster, when Godzilla is shown morphing into Mechagodzilla. This same “phony-Godzilla” costume was also employed for the final scene in The Terror of Mechagodzilla when Godzilla wades off into the ocean. Another publicity Godzilla suit (which appeared to be smiling) was employed in Cosmic Monster, in the scene when Godzilla appears in the ocean off Okinawa.

Megaro Suit Reference Images

The images below were captured from the newest Criterion Blu-ray, found online, and scanned in from books. Some of the images may have been modified to see the textures more easily.