Voltes V: Legacy

The army of the Boazan Empire, led by Prince Zardoz has attacked from far away in space. Steve, Big Bart, Little John, the three Armstrong brothers, Mark Gordon, and Jamie Robinson are all gathered at Big Falcon, a frontline base on Earth. That's when the five of them realize that their training has been for fighting the Boazans. Steve and the others board five secretly manufactured machines and set out shouting, "Let's volt in!" The five machines combine into the giant humanoid robot, the Voltes V. Heaven Sword in hand, Steve and the others boldly challenge the Beast Fighters with various weapons that utilize the special ultra electromagnetic technology of Voltes V.