Densetsu no Yuusha Da-Garn

A boy named Seiji Takasugi gains a gem known as "Aurin," representing the planet's identity, which selects him to lead eight powerful robots. These Brave robots are dormant within various locations across the globe, hidden as "Brave Stones." When Seiji activates them, they combine with individuals and technology to transform into advanced machines that obey his commands. The primary antagonist is Lord Oh-Boss, an aggressor seeking to plunder the planet's power with the help of his underlings. Seiji and the Brave robots must confront and stop this threat to prevent the planet from being drained of its energy.