When Ichinose visits Katsura, the Simeons capture him and force him to watch as they unleash Mechagodzilla 2 and Titanosaurus on Tokyo while Interpol struggles to repair their wave oscillator and the Japanese armed forces struggle to fend off the monsters. Godzilla arrives, but is initially outmatched until Interpol distracts Titanosaurus with the repaired wave oscillator, allowing Godzilla to focus on Mechagodzilla 2. Interpol agents infiltrate the aliens' hideout, rescue Ichinose, and kill Mafune and many of the aliens. The remaining Simeons attempt to escape, but Godzilla shoots down their ships with its atomic breath. The wounded Katsura shoots herself to destroy Mechagodzilla 2's control device, dying in Ichinose's arms. With the robot non-functional, Godzilla tosses it into a chasm before blasting it with its atomic breath, causing it to explode and bury it. With help from Interpol, Godzilla then defeats Titanosaurus, who returns to the sea.