Invasion of Astro Monster (1965)

Storyline:

Godzilla vs. Monster Zero (1965) Aliens from the mysterious Planet X, which resides on the dark side of of Jupiter, come to Earth asking its people to help them save their world from the dreaded King Ghidrah by letting them "borrow" Godzilla and Rodan. The aliens are actually planning to use the three monsters to take over our planet.