Galvanax is the reigning champion of Galaxy Warriors, the most popular intergalactic TV game show in the universe where contestants battle to prove who is the galaxy's mightiest warrior. Galvanax is determined to become invincible by controlling the mythical Ninja Nexus Prism, which contains the supernatural Ninja Nexus Star. Master Dane Romero fought Galvanax to keep him from obtaining the Nexus Star and apparently sacrificed himself to thwart Galvanax's plan, while in the process separating the Nexus Star into six separate Ninja Power Stars and creating from the metal of the Prism, the legendary Ninja Steel, though Galvanax and his minions Madame Odius and Ripcon made off with his son Brody.