Mechagodzilla/Prototype

Mechagodzilla (メカゴジラ Mekagojira) is a mechanized daikaiju that first appeared in the comic, Godzilla: Project Mechagodzilla.

Godzilla: Project Mechagodzilla
First seen in a flashback to 2021 at a Apex testing site in Roswell, New Mexico, Mechagodzilla was being tested against a adult Skullcrawler. Controlled by Ren Serizawa by using neural pathways with Ghidorah's skull, Mechagodzilla was able to kill the Skullcrawler by burning a hole in the chest. Though this was still a prototype, its might and strength was successful at killing the Skullcrawler. The atomic breath (or Proton Scream) was still a work-in-progress as the atomic fire resembled Godzilla's weak flamethrower-looking beam back in 2014. After a few tests, the mecha started to malfunction due to Ghidorah trying to take control of the mecha. After a while, the mecha shut down permanently and was pushed aside to build another Mechagodzilla.

Godzilla: Earthright
The motionless body of the prototype is seen in a new Monarch outpost in Juneau, Alaska.