A movie historian may tell you that this movie has some sort of significance. They may be right from a production, or musical score point of view.
From the point of view of the consumer, however, this movie makes no sense. Somehow, all the worlds monsters are trapped on one island and aren't killing each other like they did in all the other movies. They are kept in place with defenses that they could easily defeat, yet, for some reason they don't even try.
Then, out of nowhere, aliens show up. You can tell they are aliens cause they are wearing sparkly silver outfits with capes and head gear that looks like a swimming cap.
They take over "monsterland" and take remote control of some of the large monsters and use them to destroy the model... I mean major cities of the world. New York, Paris, London etc... all get the monster make over. Tokyo is spared this time, for now... dah dah dahhhhh!!!!
Naturally, Japan calls its moon astro-nots back from the moon to take their space ship underground to investigate the aliens. Oh, wait, they don't know they have an alien swim team invading yet... oh well.
Anyway, they take the space ship underground, the natural habitat for any space ship designed to travel to the moon and back, and which, for no reason, can split in half and both halves can fly independently.
So a bunch of models... I mean cities are destroyed, then some guy finds a metal ball in a rock, or something, and it turns out this is one of many balls controlling the monsters. They then find several balls in strange locations. My favorite is the coconut one. Ya, they found a ball inside a coconut.
So the good guys try to shoot the aliens, and, surprise! The bullets or lasers, or whatever their guns are supposed to shoot, do nothing to the alien swim team.
Then I tuned out as the spaceship went places and did things and the alien swim team tried to conquer earth and Tokyo finally got clobbered.
Then five monsters gang up on one space monster and kill it fast and easy. Then they give it to the aliens and beat them.
Then we see all the monsters who weren't really in the movie back in "monsterland" for about five seconds standing around doing nothing and then THE END.
So much to make fun of here. So very, very much to make fun of. I know its an old movie. I know it was about $500 000 for the budget, but man, what a cheese ball of a movie!
I throughly enjoyed it! The kitch, the "acting", the men in rubber suits, the son of Godzilla looking like a stoner... split my sides with laughter! Rodan looked like a giant, drugged up chicken! Also, when did Mothra revert to a caterpillar?
Ok, I'll stop now. If you are a fan of Toho (Godzilla) you will enjoy this film. Despite my review, I did enjoy the film. It was fun to watch the models... I mean cities get destroyed and all...