Following the defeat of the first Mechagodzilla, the aliens of the Third Planet of the Black Hole began to plan another attack. In this renewed conquest, a new project leader, Mugal, was assigned. His first goal was to order the recovery of the remains of Mechagodzilla. Although highly fragmented, the alien race worked diligently. Ultimately, they secured all the pieces near Okinawa. With the remains, a new base was established in Mount Amagi. Located far away on mainland Japan, the aliens rushed to rebuild a new Mechagodzilla.
The extraterrestrials had another plan, though. For years they had been observing the disgraced Doctor Mafune. Interested in the scientist's claim to control an animal's brain cells, the aliens watched his studies. However, when an experiment went wrong and endangered his daughter, Katsura, the aliens stepped in. Through surgery they saved her, turning the young girl into a cyborg in the process. Following the mysterious procedure, Katsura was returned to a confused Mafune. The scientist then continued his research, focused on controlling a dinosaur called Titanosaurus.
Meanwhile in present day, humanity dispatched the Akatsuki sub near Okinawa. The vessel was to search for and secure some of the Mechagodzilla remains. Looking off the coast of Cape Maeda at Okinawa, the group searched 250 meters below the surface. However, the remains were gone and the vessel was attacked by Titanosaurus. As it turned out, the aliens, in disguise, had began a collaboration with Mafune. Acting as financial backers, they orchestrated the sub attack as a test of the Titanosaurus controller. Proving successful, the crew of the sub were kidnapped and moved to Mount Amagai. There, the crew was forced to act as slaves, helping to finish Mechagodzilla. To help with their compliance, their throats were slashed in a non-fatal way to prevent speech. As for the sub, the giant dinosaur was ordered to obliterate it.
Eventually, the aliens, feeling confident of Mafune's hatred for humanity due to being disgraced by his peers, reveal their identity. Securing his cooperation, Mafune assists in building the new Mechagodzilla. In particular, he is assigned to work on the new head controller.
As repairs near completion, Mugal personally comes to check on Mafune's progress. As Mugal brags about creating the "perfect robot monster", Mafune counters this claim. Favoring Titanosaurus, the scientist cites that the machine lacks living brain tissue. Without it, Mechagodzilla can not be perfect. Unknowingly, the scientist gave the alien commander an idea. Later, when Katsura becomes injured, the Black Hole Aliens again save Mafune's daughter. This time, though, they use the opportunity to place the Mechagodzilla controller inside the girl. Now, Mechagodzilla no longer requires a base to be controlled. This would let the aliens destroy the Mount Amagai location after launch. It would also help prevent humanity from discovering them. Pleased with this turn of events, Mugal again brags to Mafune. With Mechagodzilla controlled by living brain tissue, Mugal boasts that it's truly a "perfect robot monster". With his daughter turned even more machine, Mafune briefly breaks down, distraught over her fate.
Eventually, a small group of the aliens relocate to Mafune's lab. From there, Katsura controls both Titanosaurs and Mechagodzilla. The giant machine is the first to be mobilized, leaving the Mount Amagai base. Afterwards, the area self-destructs. Next Titanosaurus is activated, and meets Mechagodzilla in Tokyo. Together, the duo commences to obliterate the city. Using its Space Beams, the Black Hole machine decimates entire blocks. Afterwards, the biped dinosaur uses its tail fin to create hurricane winds. This blows away away the remnants of the destruction.
As the giants wade deeper into the city, their assault is halted by Godzilla. Suddenly appearing, the King of the Monsters engages the two. Katsura then begins to team the two monsters together. While the giant dinosaur meets Godzilla in close combat, Mechagodzilla acts as support. This places greater emphasis on Titanosaurus, but evokes Mechagodzilla at key moments. This plays out through the towering machine using its Space Beams to assist. Ultimately, the duo overpower the King of the Monsters. Using its new Revolving Finger Missiles, Godzilla takes the attack into its mouth. Weakened, Titanosaurus kicks the monster far away into a ravine. Once more using its missiles, Mechagodzilla then buries its rival under tons of dirt.
Seemingly defeated, the giant dinosaur proceeds to jump on the upturned earth. As this further packs in Godzilla, Mechagodzilla observes from a distance. However, humanity proceeded to step in with a new secret weapon to even the odds. Using their super sonic wave oscillator, the humans keep Titanosaurs writhing in agony. This leaves enough of an opportunity for Godzilla to burst from the ground. Dishing out an atomic ray, the King of the Monsters downed its mechanical rival. Dusting itself off, Godzilla emerged from the hole just as Mechagodzilla stood again. As Godzilla advanced, the giant machine unleashed an all-out attack. Godzilla was shelled with tremendous firepower that lit up the surrounding area. Despite Mechagodzilla's efforts, though, Godzilla was able to close the gap. Rushing forward, the nuclear giant ripped the machine's head off as he did before. Unfortunately, this proved to be an almost fatal mistake.
While the first Mechagodzilla was weak in its head area, this was compensated for with Mechagodzilla II. Not only did the destruction of the head fail to down the machine, but it unveiled a powerful weapon. As its new head controller was revealed, an apparatus released a concentrated beam. So strong was this upgraded mechanism, that one blast was more than enough to topple Godzilla.
Despite the odds having turned again, Mugal was about to regret his decisions. Overcome by feelings of compassion, Katsura rebelled, realizing she alone controlled Mechagodzilla. In a selfless act, the young girl sacrificed her life to end the giant machine's reign. Without a controller, an electrical surge covered the machine, rendering it useless. Godzilla wasted no time, rushing his mechanical rival. Lifting the machine, the King of the Monsters tossed Mechagodzilla several miles away. Falling into a crevice, Godzilla ignited the area with an atomic ray. The resulting explosion destroyed and buried the machine, ending its threat to the world. |