If Mechagodzilla 2 managed to kill Godzilla in the Hesei series could they manage to defend the Earth?
Lets say they finish building MOGUERA, and fixed Mecha King Ghidorah as well.
Round One: vs Biolante, Mothra and Battra
Round Two vs King Ghidorah, Gigan, Mechagodzilla, Megalon, Godzilla (Showa)
Round Three: vs Mothra, Baragon, King Ghidorah, (GMK) Orga and Megaguirus
Round Four: vs Rodan, Anguirus, King Ceasar, Ebirah, Kumunga, Kamacurus, and Gigan (all Final Wars)
Round Five: vs Space Godzilla
Round Six: vs Destroyah
All fights take place in Tokyo