When alien invaders, plans for a children's theme park, and four giant monsters with six heads between them all collide, the result is the inevitable battle for the fate of the Earth. At least, that's how it is for Godzilla, who teams up with his former spiky foe Anguirus for a tag team match against two of his greatest adversaries: the legendary three headed King Ghidorah and Gigan, the cyborg hench-monster for insidious insect aliens who plots to wipe out all human life.

Title from web page. Originally aired in 1972. Japanese video collection.