The is a toy and animation franchise

Media franchise

A media franchise is an intellectual property involving the characters, setting and trademarks of an original work of media , such as a film, a work of literature, a television program or a video game. Generally, a whole series is made in a particular medium, along with merchandising and endorsements...

 begun by toy company Tomy

TOMY

is a Japanese toy, children's merchandise and entertainment company created from the March 2006 merger of two companies:  Tomy and long-time rival, Takara...

 in Japan. Tomy struck a cooperative deal with the animation studio Sunrise

Sunrise (company)

is a Japanese animation studio and production enterprise. It is a subsidiary of Namco Bandai Holdings. Its former name was Nippon Sunrise, and prior to that, Sunrise Studios...

 (known for its mecha

Mecha

A mech , is a science fiction term for a large walking bipedal tank or robot, including ones on treads and animal shapes.-Characteristics:...

 series, most notably Gundam

Gundam

The is a metaseries of anime created by Sunrise studios that features giant robots called "Mobile Suits" ; usually the protagonist's MS will carry the name Gundam....

) to develop the new franchise to sell their toys.

Series overview

Kanzen Shouri Daiteioh was planned to be made into a TV series, but instead only a pilot episode OVA and a manga based on the pilot was made. However, this series appears in Super Robot Wars NEO

Super Robot Wars NEO

is a Super Robot Wars video game that was released on the Nintendo Wii console on 29 October 2009. Neo was developed by Banpresto and published in Japan by Namco Bandai Games.-Summary:NEO is the first Super Robot Wars title to appear on the Nintendo Wii...

.

Show summaries and context

The robots are suddenly entrusted to primary school children by patron saint "Eldran". they control the robots by co-operating, and confront the invaders who attempt to take over the Earth.
The idea was that a school (or various places in a large town) could house the large transforming robots and their base would be the school that the kids would go to.

Similarities with Yūsha

When the Eldran series was conceived by Tomy, Takara (who would later merge with Tomy), had begun making the Brave series or Yūsha series in Japan. The robots in each series would combine in certain ways to become a powerful robot and later new robots would be introduced that could combine with the title robot. Because of these similarities Raijin-Oh was featured in the Playstation 2 video game; Brave Wars in Japan, along with several Brave series robots to show off their similarities and the game was made around the time Takara and Tomy had merged that prevented any copyright issues. Coincidentally, the Brave series anime shows was also animated by Sunrise and the robots from both Eldran and Yūsha had similar antennae on their heads.