Ghidora The Three Headed Monster | Godzlla vs Mechagodzilla

Ghidorah, the Three-Headed Monster (1964) - A princess, targeted for assassination, prophecies the arrival of a space monster. Mothra must convince Godzilla and Rodan to set aside their hatred of humanity or face the powerful space monster by herself.
Godzilla vs. Mechagodzilla (1974) - Ape-like aliens build a robotic Godzilla to destroy Japan, and the true Godzilla may not be powerful enough to destroy it.