2. Mechagodzilla
How do you take down The King of the Monsters? By making a robot version of him, that’s how.
At least that was the idea of the Simians, who built the first Mechagodzilla in 1974’s Godzilla vs. Mechagodzilla (or Godzilla vs. The Cosmic Monster). At first they disguised the robot being up as Godzilla to confuse the people of Earth, but Godzilla saw to it that his name was not dragged through the mud. In the 90s, the character was reborn as a good guy, a weapon built by the United Nations Godzilla Countermeasures Centre from the remains of Mecha-King Ghidorah that lay at the bottom of the ocean.
In the Millennium series, Mechagodzilla was renamed Kiryu and was actually built around the skeleton of the original Godzilla that attacked Tokyo in 1954. A fact that proves deadly when the bones start to remember their roots and it runs amok against their commands. Sadly, Mechagodzilla was missing from the action spectacle Godzilla: Final Wars as he had just featured in the previous two movies, Godzilla X Mechagodzilla and Godzilla: Tokyo S.O.S and the producers didn’t want to overdo the character.
With an impressive arsenal of weapons including finger missiles and eye cannons, Mechagodzilla is a worthy foe for Godzilla, and one not the be messed with.