Monstro! is one of those films that sounds like it's going to be a sure-fire winner when read about. It even has a cool poster. In truth, it doesn't live up to its potential. Its story has three bad girls on the run for a double murder. They wind up at a small seaside town that is terrorised by a tentacled sea monster. It should be fairly obvious from the above synopsis that this is a movie with more than a passing debt to the exploitation classic Faster, Pussycat! Kill! Kill! Furthermore, it even features the quite specific detail of a wheelchair bound misogynistic old man, which also aligns it with Russ Meyer's film. But this is a far less interesting movie sadly. The three girls here are a far cry from the Pussycats unfortunately and aren't nearly alluring enough to carry the film too far, although they are still the best thing about it.
Irrespective of the bad girl trio, it's essentially a low budget Australian creature feature. The monster of the title does pitch up every so often and gets involved in some gory killings. We don't really see too much of it beyond tentacles until the pretty decent finale. But the very combination of the three bad girls on the run with a creature feature is quite odd and does feel like two entirely different films colliding head on; which I am sure was the intention of the writer/director. There's also a pretty good soundtrack of retro tunes which adds some value to proceedings.
I would have to classify this as a bit of a miss considering the great possibilities it suggests. But overall it is fairly entertaining and doesn't ever get boring. And at 75 minutes it never out stays its welcome.