Tomy struck a cooperative deal with the animation studio Sunrise (known for its mecha series, most notably Gundam) to develop the new franchise to sell their toys.
However, this series appears in Super Robot Wars NEO.
They control the robots by co-operating, and confront different types of evil organizations who attempt to take over the Earth.
The idea was that a school (or in the case of Ganbaruger, Revolger and Gekiryuger, it's 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.
When Takara and Tomy merged into TakaraTomy, the similarities between the two franchises led to Raijin-Oh being featured in the PlayStation 2 video game Brave Wars alongside several Brave characters.