First appearance: Rodan (1956)
Rodan is based on a pteranodon, and is one of a few trusty allies of Godzilla—or would be, if he wasn't constantly being used by aliens with the power of mind control. Alien mind control is big in kaiju movies, resulting in allied monsters fighting each other almost as much as they fight their enemies. Rodan can, of course, fly and wreak all sorts of windy havoc by flapping his wings. Godzilla often needs an assist to take down the bad guys, and Rodan is his best wingman. In three films, the pair team up to defeat King Ghidorah.