This is the only incarnation of King Ghidorah to appear in a film without Godzilla. Like the Showa incarnation of the character, this King Ghidorah is an evil space monster, and first invaded Earth millions of years ago during the Cretaceous. King Ghidorah returned to Earth in the present day to feed on the life forces of human children, trapping them all inside a gigantic dome in the forests around Mount Fuji. Rainbow Mothra attempted to stop King Ghidorah, but was soundly defeated. Rainbow Mothra traveled back to the Cretaceous period and battled King Ghidorah's younger and weaker form, seemingly killing him by dropping him into an active volcano. When Rainbow Mothra returned to the present day, King Ghidorah reappeared and continued his reign or terror. Rainbow Mothra then transformed into Armor Mothra and destroyed King Ghidorah.