Hyakujuu Sentai Gaoranger (2001)

A thousand years ago, a war was commenced between humans and the demonic Ogre Tribe Org race. With the aid of the Power Animals, the ancient Gao Warriors defeated the Org's leader, Hyakkimaru, and the Orgs were sealed off from the world. One millennium later, the Org race has been revived so the Power Animals must seek out five new members to helm as the Gaorangers. With the very purpose of protecting the Earth by abandoning their current lives and pledge commitment of defeating the Org race as the new generation of Gao Warriors.