Redmoon has a long, King Ghidorah-like neck, as well as big King Ghidorah-like wings, and giant claws.
Redmoon came from the moon, and some time later Erabus appeared. The Japanese Self Defense Force thought they could lure the two kaiju together so they could defeat each other, but they turn out to be the same species and of opposite genders. They soon have a son dubbed Hafun, who is killed later on. Redmoon and Erabus go berserk with grief and attack Japan, but Godzilla intervenes and defeats them.