All Monsters Attack, released in Japan as Gojira-Minira-Gabara: Ōru Kaijū Daishingeki (ゴジラ・ミニラ・ガバラ オール怪獣大進撃, lit. Godzilla, Minilla, and Gabara: All Monsters Attack), is a 1969 Japanese science-fiction kaiju film produced by Toho. Directed by Ishirō Honda, the film stars Tomonori Yazaki, Eisei Amamoto, and Kenji Sahara. The tenth film in the Godzilla series, this was also the first film specifically geared towards children. While credited with the special effects work, Eiji Tsuburaya was not directly involved with the production of this film. The credit of special effects supervisor was given out of respect, since he was still the head of the Visual Effects Department. The effects were handled by Ishirō Honda himself, with assistance from Teruyoshi Nakano.
The film was released theatrically in the United States in the winter of 1971 by Maron Films as Godzilla's Revenge, where it was paired up nationwide on a double bill with either War of the Gargantuas or Night of the Big Heat (also known as Island of the Burning Damned).
Ichiro Miki (Tomonori Yazaki) is a highly imaginative but lonely latchkey kid growing up in urban (and at that time, polluted) Kawasaki. Every day he comes home to his family's empty apartment. His only friends are a toymaker named Shinpei Inami (Eisei Amamoto) and a young girl named Sachiko (Hidemi Ito). Every day after school, Ichiro is tormented by a gang of bullies led by a child named Sanko Gabara (Junichi Ito). To escape his loneliness, Ichiro sleeps and dreams about visiting Monster Island. During his visit, he witnesses Godzilla battle three Kamacuras and Ebirah, a giant sea monster. Ichiro is then chased by a rogue Kamacuras and falls into a deep cave, but luckily avoids being caught by Kamacuras. Shortly afterward, Ichiro is rescued from the cave by Minilla. Ichiro quickly learns that Minilla has bully problems too, as he is bullied by a monstrous ogre known as Gabara.
Ichiro is then awoken by Shinpei who informs him that his mother must work late again. Ichiro goes out to play, but is then frightened by the bullies and finds and explores an abandoned factory. After finding some souvenirs (tubes, a headset, and a wallet with someone's license), Ichiro leaves the factory after hearing some sirens close by. After Ichiro leaves, two bank robbers (played by Sachio Sakai and Kazuo Suzuki) who were hiding out in the factory learn that Ichiro has found one of their driver's licenses and follow him in order to kidnap him.
Later, after his sukiyaki dinner with Shinpei, Ichiro dreams again and reunites with Minilla. Together they both watch as Godzilla fights Ebirah, Kumonga, and some invading jets. Then in the middle of Godzilla's fights, Gabara appears and Minilla is forced to battle him, and after a short and one-sided battle, Minilla runs away in fear. Godzilla returns to train Minilla how to fight and use its own atomic ray. However, Ichiro is woken up this time by the bank robbers and is taken hostage as a means of protection from the authorities.
Out of fear and being watched by the thieves, Ichiro calls for Minilla's help and falls asleep again where he witnesses Minilla being beaten up by Gabara again. Finally, Ichiro helps Minilla fight back at Gabara and eventually, Minilla wins, catapulting the bully through the air by a seesaw-like log. Godzilla, who was in the area watching comes to congratulate Minilla for its victory but is ambushed by a vengeful Gabara. Godzilla easily beats down Gabara and sends the bully into retreat, never to bother Minilla again. Now from his experiences in his dreams, Ichiro learns how to face his fears and fight back, gaining the courage to outwit the thieves just in time for the police, called by Shinpei, to arrive and arrest them. The next day, Ichiro stands up to Sanko and his gang and wins, regaining his pride and confidence in the process. He also gains their friendship when he plays a prank on a billboard painter.
All Monsters Attack includes extensive stock footage of Ebirah, Horror of the Deep and Son of Godzilla as well as footage from King Kong Escapes and Destroy All Monsters.
All Monsters Attack was released theatrically in Japan on 20 December 1969 where it was distributed by Toho. The film was the first "Toho Champion Matsuri", a festival-style program that included shorts and feature films.
The film had been test-screened under the title Minya, Son of Godzilla in the United States. The version was edited further and released with an English-language dubbed version in 1971 under the title Godzilla's Revenge. This version of the film was distributed by Maron Films as a double feature with Island of the Burning Damned. The film was released on home video in the United States in 2007 with its original Japanese version.