Terror of Mecha King Ghidorah

Terror of Mecha King Ghidorah is a direct sequal to King Ghidorah vs Mecha King Ghidorah (1974), and the movie to feature King Ghidorah. This is a parody of Terror of Mechagodzilla. King Ghidorah meets a new monster Megalon.

Plot
King Ghidorah comes to the rescue when an alien race rebuilds Mecha King Ghidorah to destroy Earth's cities. A traitorous scientist gives them a second weapon: Megalon.