Mekagojira no gyakushu
From The Internet Movie Plane Database
English title: Terror of Mechagodzilla
Katsuhiko Sasaki (Akira Ichinose)
Tomoko Ai (Katsura Mafune)
Akihiko Hirata (Dr. Shinzô Mafune)
Katsumasa Uchida (Agent Jiro Murakoshi)
Goro Mutsumi (Mugal)
Tadao Nakamaru (Chief Tagawa)
Godzilla must once more battle his mechanical duplicate, Mechagodzilla, this time assisted by a new monster, the undersea dinosaur Titanosaurus. In the meantime, Japanese Interpol agents battle the evil aliens and the mad scientist controlling the two monsters.
Used against Titanosaurus in the final battle. It is represented with a combination of an actual aircraft and a scale model.