This film is a decent follow up to the original film. It pretty much shows that you don't have to be a scientist or a major military figure to be a hero. The only thing negative criticism I have about it is that it tends to slow down when it gets to the scenes that feature only the human characters. However, the film really picks up steam when the fight between the two monsters begins.
Also, there is an interesting fact about this film. When it was first proposed that this film would be released in the United States, the title was for the American version was to be called "The Volcano Monsters" and it was to be written by noted schlock master Ib Melchior, the man behind such B classics as "Reptilicus" and "The Angry Red Planet", and his partner Edwin Watson. The proposed production would have used some of the footage from "Godzilla's Counterattack." The premise for the story was to involve the discovery of a tyrannosaurus (Godzilla) and an ankylosaurus (Angillas) in a cave on a remote island. The two monsters are then brought to San Francisco (the Japanese buildings would have been explained as being San Francisco's Chinatown) and then escape and start to fight all over the city. The ankylosaurus is killed during the battle and the tyrannosaurus is then left to rampage all over the city until it escapes to the Artic Circle where in the climatic battle it is covered in ice and preserved forever.
An interesting note, Melchior used several of the intended plot devices for "The Volcano Monsters" in Reptilicus, including the ending which showed the claw of another monster, which was poking out of the cave where the two monsters were found.
