Two mad scientists, Professor Hiiragi and Count Collection, simultaneously manage to open a dream hole to an alternate world where myths are real, the Sixgate world. Professor Hiiragi recruits his daughter Rokuna and her friend Mondo to be the Mon Colle Knights and help him in obtaining six magical items before Count Collection does. These items which can alter the barriers of dimensions when combined, allowing them to be used to either peacefully have the magic of the Sixgate world cross over in the human world, take over the minds of all monsters, or worse, reformat reality. While this entry only has details based on the Japanese version, it also includes the version aired on Jetix.

A gigantic meteorite landed on earth a few years back. A mysterious capsule believed to have belonged to the aliens was discovered. Called the black box, an international organization called Project BB was created to research it. Eight boys, including Manabu Yoshimura, attend International Academy, a school located near Project BB headquarters. They are enticed by their teacher Toukichi Hashiba's promise of I'll give you class credit, and end up getting involved in his experiment. The experiment was to enter the eight empty chambers of meteorite. According to Hashiba's theory, the meteorite should strongly respond to strong human thoughts. He tells them to have a clear image of a great looking gigantic robot; if they do, something should happen... Then, a big spaceship appears in the sky and an alien calling himself Wercury appears in a 3-D image. He tells them he is from the Star of Prokimasi and that he has come to collect the meteorite of the Choshin people. If they do not hand it over, he will challenge the earth beings to a battle. Manabu and his friends are confused by the unexpected turn of events but the meteorite responds to the thoughts of the group and suddenly starts to transform itself into a gigantic robot. Then, attacked by the invading Prokimasi robot, they are forced to pull their strength together and fight back. But it is extremely difficult to put the wills of the eight together as one and the robot cannot fight in the way it should. The gigantic robot that Hashiba named Gakusaver and Manabu's eight; can they manage to protect Earth and the meteorite from the Prokimasi invasion? (Source: King Records)

A hero will never give up, never hide, never be defeated and never accept evil! Firmly believing these words, Masayoshi Hazama has been obsessed with superhero shows since childhood. By day, he earns his living as a famous model, and by night, he becomes the gallant hero Samurai Flamenco. Armed with only his superhero costume, he seeks to bring justice to the city and faces anybody who tries to break the law—even rebellious juveniles and people who litter on the street. Masayoshi's heroic antics later catch the attention of the public, leading to the fateful discovery of his identity by policeman Hidenori Gotou. Although initially telling Masayoshi to leave the crime-busting activities to the police, Gotou ends up joining him in his antics. However, things soon escalate from preventing littering and petty thefts to bizarre adventures that involve even the fate of the world. Together with their newfound comrades, Masayoshi and Gotou embark on a battle with the world and themselves in order to find the true meaning of being a hero—with or without superpowers.

A special summary episode of the first season of Sayonara Zetsubou Sensei, focusing on seven of the girls: Komori Kiri, Matoi Tsunetsuki, Kobushi Abiru, Kimura Kaere, Kitsu Chiri, Sekiuchi Maria Tarou and Hitou Nami. Note: This entry also includes the 24 minute version which aired on BS11.