Choujin Gakuen Gowcaizer: The Voltage Fighters

As the 21st century dawns, the first tremors of apocalypse arrive in the form of a catastrophic earthquake that reduces half of Tokyo to a wasteland of twisted steel and shattered rubble. Isato Kaiza is an athletic, popular, and otherwise unremarkable student—until the day his classmate Kash, also known as Hellstinger, entrusts him with a Caizer Stone. Empowered by this mysterious crystal, Isato gains the ability to transform into the armored hero Gowcaizer. Now, to prevent the annihilation of humanity, Gowcaizer and Hellstinger must unite against Omni Exist—a being born from the sum of all negative human desires and the true instigator behind the recent calamities—before it erases the human race entirely.