Moguera

Moguera (モゲラ, Mogera) is a giant robot mole used by the Mysterian aliens to conquer the Earth.

The Mysterians
Moguera was sent to Earth by the Mysterians to conquer it. It first arrived in a small Japanese village, which it destroyed. Moguera continued to rampage through the countryside, shrugging off all attacks by the military. The military eventually rigged a bridge with explosive charges and waited for Moguera to cross it. When Moguera tried to cross the bridge, the charges were detonated and Moguera fell into a ravine below and exploded.

Later, when the Mysterians had begun their full invasion of Earth, they unleashed a second Moguera to attack the Earth Defense Force's units. Moguera burrowed up from underneath a Markalite cannon, which fell on top of it and destroyed it.

Abilities
Moguera is designed as a war machine, boasting impressive firepower and thick armor, but slow movement. Moguera can emit high temperature from its body, fire destructive laser beams from its eyes, and burrow underground.

Trivia

 * Moguera was the first robot monster to appear in any of Toho's films.
 * Moguera reappeared in the 1988 video game Godzilla: Monster of Monsters! for the Nintendo Entertainment System as a boss that can be fought by Godzilla and Mothra. Moguera also made an appearance in the 1997 television series Godzilla Island, under the name "Proto-Moguera".
 * Moguera directly inspired another monster, M.O.G.U.E.R.A., which fought alongside Godzilla in the 1994 film Godzilla vs. SpaceGodzilla.