Rodan's History
Rodan was a pterosaur-like kaiju that had been mutated by nuclear waste.
When a team of scientists led by Hiroshi Omae arrived on Adonoa Island and discovered an intact egg in a Pteranodon nest, they prepared to load it onto a helicopter so they could bring it back to Japan. As they were doing so, Rodan flew overhead and destroyed their campsite. Omae stated that Rodan was an irradiated Pteranodon that must have hatched from another egg in the same nest. Rodan landed on a cliff overlooking the sea, which began to suddenly flash. Rodan stared into the water, only for a beam of Godzilla's atomic breath to shoot out of the water and strike the cliff. Rodan took flight and flew out over the water, producing shockwaves on the surface of the water. Godzilla fired his atomic breath at Rodan, with one blast striking his wing. Godzilla came ashore on the island, only for Rodan to fly behind him and strike him with the spikes on his chest. Rodan began pecking Godzilla in the back of the head with his pointed beak. Godzilla's dorsal plates began to flash, leading Rodan to fly away as Godzilla fired his atomic breath at him. Rodan circled around Godzilla, then flew directly at him and knocked him to the ground with his wing. Rodan dove onto Godzilla and began pecking at his face, but Godzilla managed to grab Rodan by the throat, choking him until blood began to pour from Rodan's mouth. Godzilla threw Rodan off of him and blasted him with his atomic breath, only for Rodan to fly back at him and knock Godzilla headfirst into a mountain, which collapsed onto Godzilla and buried him in rubble. Rodan flew overhead, but Godzilla's tail knocked Rodan out of the sky. Godzilla rose from the rubble and blasted Rodan with his atomic breath, then stomped on his back. Rodan tried to take flight, but Godzilla blasted him twice at point-blank range with his atomic breath, sending Rodan crashing into a rocky slope and leaving him seemingly dead. In the confusion, the scientists had managed to escape the island with the egg, with Godzilla following after them, intent on recovering the egg for himself.
When a choir of psychic girls sang a song to BabyGodzilla, the creature that hatched from the egg found in Rodan's nest, Rodan heard it all the way back on Adonoa Island. Rodan was revived as the more powerful Fire Rodan and immediately flew to Japan to rescue his surrogate brother. When Fire Rodan arrived, BabyGodzilla was being airlifted via helicopter to the Ogasawara Islands, where G-Force hoped to lure Godzilla so he could be killed by Mechagodzilla. Fire Rodan intercepted the chopper while it was still flying over Japan, destroying it and grabbing the canister holding BabyGodzilla and his surrogate human mother Azusa Gojo. Fire Rodan touched down in a nearby city and attempted to break open the canister with his beak. G-Force deployed Mechagodzilla and the Garuda to defeat Fire Rodan. Fire Rodan took flight and managed to bring down the Garuda by slamming his chest spikes into it, sending it crashing into a nearby building. Fire Rodan turned his attention to Mechagodzilla, firing his new uranium heat beam at the mecha and attacking it up close with his beak. Fire Rodan managed to destroy Mechagodzilla's right eye with his beak, but Mechagodzilla used the plasma it had absorbed from Fire Rodan's beam to blast him with its plasma grenade, shredding Rodan's chest and sending him flying into several buildings.
With Fire Rodan seemingly dead, Godzilla unexpectedly appeared in the city and engaged Mechagodzilla in battle. Mechagodzilla combined with the Garuda to form Super Mechagodzilla, and crippled Godzilla by destroying his secondary brain with its G-Crusher system. At this point, BabyGodzilla broke free of the canister and cried out, gaining the attention of the wounded Fire Rodan. Fire Rodan took flight, only to be shot down by Super Mechagodzilla's mega buster. Fire Rodan fell on top of Godzilla, and began transferring his life force into him. As Fire Rodan faded away, Godzilla's secondary brain was regenerated, and he rose back to his feet. Empowered by Fire Rodan's energy, Godzilla destroyed Super Mechagodzilla and left Japan with BabyGodzilla.