After a treacherous expedition to retrieve a giant opal, disaster strikes as the opal reveals itself to be an egg which spawns Barugon, demon dog from Hell! Armed with a deadly tongue and cold beams, Barugon wreaks havoc on Japan. Gamera comes to save the day.
Gamera's back, and just in time to save Japan from Gyaos, a mysterious bat-like creature awakened by a volcanic eruption. As in the first Gamera movie, a young boy establishes an emotional link with Gamera, and the two work together, with the help of the world's scientists, to put and end to Gyaos' violent rampage.
A moon base is destroyed by a spaceship with a cluster of gumballs on its head. Later, at Sea World, dolphins are dying mysteriously. Zigra kidnaps two men and two children (one of whom is a Coke addict - Coca-Cola that is) and starts causing earthquakes. The two six year olds somehow outwit Zigra and help their incapacitated fathers escape. The Zigra Woman, who can use her eyes to put people into comas, then chases them all over Sea World like an extended Benny Hill skit. Somewhere in this movie Gamera finally shows up, fights Zigra, who turns into a giant swordfish.
A nuclear explosion in the far north unleashes Gamera, the legendary flying turtle, from his sleep under the ice. In his search for energy, Gamera wreaks havoc over the entire world, and it's up to the scientists, assisted by a young boy with a strange sympathic link to the monster, to put a stop to Gamera's rampage.
A group of aliens from another planet head for Earth with the intentions of conquering it. Their first ship is destroyed in transit by the giant flying turtle Gamera. A second ship makes it to Earth and captures two Boy Scouts and holds them captive so that Gamera will not attack them. The aliens then implant a remote control device into the monster's neck and use the great turtle to attack Tokyo.
Toru Aizawa, a 11 year old boy suddenly finds a tiny egg on a red mysterious stone. the egg hatches and comes out an abnormal little turtle (Toto) which not only grows rapidly, but also flies in the air and even blows fireballs. At the meantime, a series of mysterious ship wrecks are reported. Later on, even more disasters happen when a huge evil ferocious monster Lizard (Zeus) suddenly comes out from the sea and attacks, wrecks and demolishes the world. the last hope of mankind relies on the friendly great monster, Gamera, which looks similar to Toto, but disappeared 33 years ago. Is Toto the descendant of Gamera? is Toto able to fight against the huge evil?
A giant creature attacks Japan during the World Fair and it's up to Gamera to stop it. But the monster injects Gamera with its offspring and a research team must take a craft into Gamera's body to eliminate the parasite.
Aliens kidnap two children and take them to another planet for the purpose of getting knowledge from their brains, but Gamera follows and tries to rescue them.
This final installment of the recent Gamera trilogy begins with schoolgirl Ayana discovering a large egg in a cave that, according to legend, houses demons. The egg hatches into a small monster, which Ayana decides to raise and quickly develops a psychic bond with. As Ayana's monster, named Iris, grows to adulthood, the flying turtle Gamera begins to take an interest in this new potential threat. Who will be the victor in the final battle, and how much of Japan will be left standing at the end?
A hibernating species of giant carnivorous bird is awakened on a Japanese island shortly after the Japanese military encounters an unidentified mass moving beneath the water off-shore.
A strange meteor lands in Japan unleashing hundreds of insect-like "legion" creatures which find their way into Tokyo. When the military fails to control the situation, Gamera shows up to deal with the ever-evolving space adversary.
When the evil alien Zanon comes to enslave Earth, all hope seems lost. The Earth's resident superheroes, the Spacewomen, are powerless to stop him. They must enlist the help of a young boy who has a special connection with the giant turtle Gamera. The Friend of All Children then battles Gyaos (a flying monster), Zigra (an alien shark), Viras (a space squid), Jiger (a giant lizard), Guiron (a space beast) and finally Barugon (another giant lizard). Gamera then sacrifices himself to kill Zanon by destroying the space pirate's ship.