Like many of the monsters that appeared in the Godzilla saga, Moguera originally starred in his own, non-Godzilla movie, The Mysterians. In The Mysterians, Moguera was a robot used by alien invaders. The two Mogueras have no connection, and almost bear no resemblence, except for the distinct snout. Because of this snout, Godzilla fans nickname Moguera "Woody Woodpecker." The name Moguera became an acronym when it starred in Godzilla vs. Spacegodzilla.

M.O.G.U.E.R.A. is an acronym for Mobile Operation Godzilla Universal Expert Robot Aero-Type. After Godzilla defeated Mechagodzilla, the United Nations Godzilla Countermeasures Center (aka "G-Force") built Moguera as another anti-Godzilla weapon. When G-Force, though, found Spacegodzilla heading for Earth, Mogera was used to fight him instead. Mogera and Spacegodzilla engaged in battle in the asteroid belt, with Spacegodzilla gaining an easy victory. The heavily damaged Moguera headed back to Earth, and was repaired by G-Force. Mogera then fought alongside Godzilla to defeat Spacegodzilla. One of the crew memebers named Yuki, who has a grudge against Godzilla, takes control of Moguera to try and fight Godzilla. His two crew-members knock him out, and take back control of Moguera. After a long battle in Fukuoka, Moguera and Godzilla kill Spacegodzilla. Moguera became heavily damaged during the battle, and Godzilla destroyed the remains of Moguera, possibly for revenge for when Yuki used the super-weapon to attack Godzilla. It is not known whether Japanese taxpayers were mad or not for after the defeat of the two zillion dollar superweapons Mechagodzilla and Moguera.