Hyakujuu Sentai: Boundless Darkness

The protagonist travels to the world of Hyakujuu Sentai Gabaranger and becomes a humanoid armored Orugu. In order to survive and not be destroyed, he searches for other Gabarangers to become stronger, demonizes them and subdues them. At the same time, he fights against the Gabarangers and occasionally helps them or allows them to gain new power.