When Mothra went into outer space to stop a meteor from reaching Earth, she accidentally took with cells from Godzilla and remaining cells from Biollante that inhabited our atmosphere. The combined cells went through a black hole and created a new creature, Space Godzilla. Space Godzilla heads to Earth to confront Godzilla, Junior Godzilla, and the new G-Force robot, MOGERA.
A 400-foot dinosaur-like beast attacks Tokyo. Filmed in 1954 as Gojira, this grandaddy of all Japanese giant-reptile epics was picked up for American distribution two years later, at which time several newly filmed inserts, featuring Raymond Burr as reporter Steve Martin, were edited into the original footage.
In the 6th Godzilla movie, mysterious aliens from the Planet X ask earth's people to help them save their world from the dreaded Ghidorah (aka "Monster Zero") by letting them "borrow" Godzilla and Rodan.
Leon, the top hit man in New York, has earned a rep as an effective "cleaner". But when his next-door neighbors are wiped out by a loose-cannon DEA agent, he becomes the unwilling custodian of 12-year-old Mathilda.