Godzilla vs. MechaGodzilla II: In 1992, the United Nations establishes the United Nations Godzilla Countermeasures Center (UNGCC) to stop Godzilla. The mechanical middle head of Mecha-King Ghidorah is salvaged by the UNGCCs military branch, known as G-Force, and reverse engineered to create two anti-Godzilla machines, the first being an aerial gunship called Garuda and a mecha modeled after Godzilla called Mechagodzilla. Two years later, on a mission to Adona Island in the Bering Sea, a Japanese team comes across what they assume is a large Pteranodon egg. The egg gives off a telepathic signal that attracts Godzilla and Rodan, an adult Pteranodon irradiated by the nuclear waste. Godzilla critically wounds Rodan during the ensuing battle, while the research team escapes with the egg. It's taken to a research center in Kyoto, where it imprints on a young female scientist. When a Baby Godzilla hatches from the egg, the research team concludes that the egg was left in the Pteranodon nest with Rodan in a manner similar to the brood parasitism displayed by European cuckoos. Godzilla appears in Japan, once again responding to the creature's psychic call. The JSDF mobilizes Mechagodzilla, which intercepts Godzilla as it is making his way to Kyoto. The two battle, with Mechagodzilla seeming to have the upper hand until Godzilla disables Mechagodzilla with an energy pulse. Godzilla continues searching for Baby, but the scientists, having discovered the telepathic link between the monsters, shield it from Godzilla. Frustrated, Godzilla destroys most of Kyoto before returning to the ocean. Tests on the baby reveal that it has a second brain in its hips that controls the animal's movement. The UNGCC assumes that this also holds true for Godzilla, and decide to use Baby to bait Godzilla into a fight with Mechagodzilla. The "G-Crusher" is installed in Mechagodzilla's wrists, allowing the robot to penetrate Godzilla's hide and paralyze the monster by destroying his second brain. Miki Saegusa, a young psychic, is ordered to become a part of Mechagodzilla's crew, and to locate Godzilla's spinal brain. She is reluctant to do so, due to her mental connection with Godzilla (established in Godzilla vs. Biollante), but follows her orders. The plan backfires when Rodan, having survived its battle with Godzilla and further mutated by radiation, responds to Baby's call and intercepts the UNGCC transport. The UNGCC is forced to send Mechagodzilla and Garuda after Rodan instead and, in the ensuing battle, Rodan is mortally wounded. Godzilla shows up moments later and attacks Mechagodzilla. When the two appear to be evenly matched, Mechagodzilla combines with Garuda. The upgraded Mechagodzilla, called Super-Mechagodzilla, carries out the G-Crusher plan and succeeds in paralyzing Godzilla. Suddenly, the dying Rodan, once again revived by Baby's call, begins flying towards Baby, but is shot down by Mechagodzilla, crashing atop Godzilla. Rodan's life force regenerates Godzilla's second brain and supercharges it. Now more unstoppable than before, Godzilla attacks and destroys Super-Mechagodzilla with a high-powered red spiral atomic ray. Godzilla finally locates Baby, who is at first afraid of the giant monster. Miki telepathically communicates with Baby, convincing it to go with Godzilla. The two monsters head out to the sea. Godzilla vs. SpaceGodzilla: Godzilla cells brought into space by Biollante and Mothra are exposed to intense radiation from a black hole, resulting in the birth of "SpaceGodzilla", which quickly makes its way to Earth, destroying a NASA space station along the way. Meanwhile, members of the United Nations Godzilla Countermeasures Center arrive at Birth Island in order to plant a mind control device on Godzilla. The Cosmos, Mothra's twin priestesses, appear to psychic Miki Saegusa and warn her of SpaceGodzilla's arrival. M.O.G.U.E.R.A. (Mobile Operations G-Force Universal Expert Robot: Aero-type), a mecha built by the JSDF to replace Mechagodzilla, is sent in to intercept SpaceGodzilla, but suffers damage in the process. SpaceGodzilla lands on Birth Island and attacks Godzilla's offspring, Little Godzilla. Godzilla intervenes but finds itself overwhelmed by SpaceGodzilla, and is powerless to stop its clone from trapping Little Godzilla in a crystal prison. SpaceGodzilla leaves for Japan with Godzilla in pursuit. Shortly thereafter, the Yakuza abduct Miki and bring her back to their base in Fukuoka in an attempt to use her psychic abilities to gain control over Godzilla. Miki is saved by a rescue team before SpaceGodzilla arrives. SpaceGodzilla lands in central Fukuoka and forms a massive fortress of celestial crystals. M.O.G.U.E.R.A. arrives to once again fight SpaceGodzilla, but is still no match for it. Godzilla arrives in Kagoshima Bay and fights SpaceGodzilla, but SpaceGodzilla easily gains the upper hand. The JSDF discovers that SpaceGodzilla is using Fukuoka Tower as a power converter, using it to transform the Earth's core into an energy that SpaceGodzilla can absorb, slowly killing the planet. While Godzilla wrestles with SpaceGodzilla, M.O.G.E.R.A. splits into two different mechas: the Star Falcon, a flying battleship, and the Land M.O.G.U.E.R.A., a tank with a large drill in front of it. The mechas damage the crystal fortress while Godzilla pushes over Fukuoka Tower, cutting off SpaceGodzilla's energy supply. M.O.G.U.E.R.A. quickly reforms and blasts off SpaceGodzilla's crystal-like shoulder formations, weakening it. SpaceGodzilla critically damages M.O.G.U.E.R.A., but is subsequently incinerated by Godzilla's supercharged atomic heat ray. Godzilla makes its way back to Birth Island after Miki uses her psychic powers to remove the mind control device from its neck. Little Godzilla is then freed from the crystal prison and begins blowing tiny radioactive bubbles.