This was the first of a number of incalculable sequels to the 1954 "Godzilla" movie. There's really something important about this movie that it explicitly addresses that you should know. This is actually not the same Godzilla that was in the original, but another one of its species. It's also asked why they don't just use the Oxygen Destroyer from the first movie. It's implied that the scientist gave his life so that it couldn't be used for evil purposes and can't be recreated. This is also the first time Godzilla fights another monster.
The flaw is that there's probably too much going on in this movie. We have the monsters fighting but Godzilla also seems to be destroying a city in the process. It should have just focused on the monster fight. The effects aren't as good as in the original movie, but they're still not bad. The series itself became goofier as time went on. Still, there are people dying when those buildings are being destroyed. Not one of the most memorable, but far from the worst. **1/2
The flaw is that there's probably too much going on in this movie. We have the monsters fighting but Godzilla also seems to be destroying a city in the process. It should have just focused on the monster fight. The effects aren't as good as in the original movie, but they're still not bad. The series itself became goofier as time went on. Still, there are people dying when those buildings are being destroyed. Not one of the most memorable, but far from the worst. **1/2