Godzilla Vs Mechagodzilla (1974)

The Fighters: Ape-type aliens decide to destroy Japan.

Instead of using conventional weapons ,their plan involves building a giant, cyborg/mechanised version of the country's most famous beast and sending it stomping into the big cities.

Naturally, the citizens fight back with the big G himself, but when it looks like he might not be enough to take down the robo-monster, humanity summons King Caesar (sounds like a wrestler, looks like a cross between a dog and a lion) to help in the conflict.

What Started The Fight? The success of every other brilliant Godzilla movie.

The Loser: American audiences, who saw a trimmed-down version of the film thanks to the MPAA.

And Toho didn't exactly hit it big with the film, though it did do better business than the film before it, Godzilla Vs Megalon.

Next: Alien Vs Predator