Rodan movie, but Toho apparently had other ... keeping them on the same side in Invasion of Astro Monster and Destroy All Monsters. Had he not appeared in Ghidorah, the Three-Headed Monster ...

You probably know Godzilla — the "king of monsters ... He’s evil and is determined to destroy life in the universe. Godzilla, Mothra and Rodan have to team up to stop him!