The original Godzilla vs. Mechagodzilla is quite an enjoyable entry in the franchise and definitely an improvement then it's three predecessors, but it's not without it's flaws. The story is simply another alien invasion story, this time about aliens who are actually rip-offs of the apes from Planet of the Apes. There's a prophecy about a monster that will arise and destroy Japan while two monsters will save it. They think the destroyer is Godzilla when he appears and destroys some stuff, but it's revealed to be an imposter, while the humans and aliens fight over a statue to awaken King Caesar. The story is entertaining but at the same time the reusing of aliens over and over for these last few entries makes it feel stale, and so do the characters, as they are another cast of forgettable, shallow archetypes with nothing to them. None of the characters, except maybe the alien commander, really resonate and are one-dimensional. In fact, you can actually end up mixing them up. Also, the aliens in this film make no sense, with some of their decisions being rather questionable, and the reveal that they are actually space apes raises a lot of questions, such as why they suddenly lose their human-like intelligence when they revert back to their true forms, and why they need help from the human scientist to fix Mechagodzilla, which they created from their own technology. The ape makeup and the effect of them transforming also look atrocious. The monster side of things, however, makes up for these somewhat lacking areas. Mechagodzilla looks great, with a design resembling a menacing cartoon villain, Godzilla's design is a vast improvement over the previous one and is definitely one of the best Showa Godzilla designs, Anguirus looks just as good as ever, and King Caesar is another creative new monster that adds a mammalian touch to Godzilla's vast array of kaiju. The special effects are also an improvement over the last few entries and quite well done, with many satisfying and entertaining monster scenes and tons of awesome explosions. Masaru Sato delivers probably his best musical score here, as his music is fun and jazzy while also being foreboding. Overall, Godzilla vs. Mechagodzilla is a decent, enjoyable Godzilla film. While it lacks in delivering compelling human characters, it delivers in satisfying kaiju action that will leave any Godzilla fan entertained.