Voltage Fighter Gowcaizer(1996)

Choujin Gakuen Gowcaizer: THE VOLTAGE FIGHTERS

The world has been rocked by a series of natural catastrophes — the handiwork of Shizuru Ozaki. Unbeknownst to the rest of the world, Ozaki aspires to something greater than mere mortality — even if that means destroying mankind....

But one man has the power to stop him. Armed with the mysterious Caizer Stone, Isato Kaiza possesses the power to transform into the armored hero GOWCAIZER! Gowcaizer and Hellstinger join forces with a vengeful man with a magic sword and a hidden past. Together, they must defeat Omni-Exist, the ghost-like personification of destructive human impulses.

(Source: Image Entertainment)

Note: The International Edition movie features added scenes with the character Necrocaizer, who was introduced in the drama CDs.