Still vexed by learning of Basco's ability to take greatest powers from past Sentai warriors, Captain Marvelous gets into a heated argument with Navi over the parrot's inability to give more accurate predictions. The ruckus is interrupted by the appearance of Satoru Akashi, who gave the Gokaigers the Great Power of the Boukengers a while ago. He then asks the Gokai Galleon crew for their aid in his search for a Precious known as the "The Heart of Hades" - which has the power to resurrect the dead. Though not interested, Captain Marvelous reluctantly accepts Satoru's offer. Upon landing on a forest to begin their treasure hunt, the Gokai Galleon crew and Satoru encounter a Gormin platoon under Insarn - who is also after the Precious for the Zangyack to use. While the others deal with the Gormin in the forms of the Kakurangers and Shurikenger, Captain Marvelous, Luka and Satoru proceed ahead and arrive to a cave where they find an entire platoon of Zangyack soldiers dead. Once inside, they find the Heart of Hades in the hands of a Jaryuu who dies using it to revive an old enemy of the Boukengers: Creator King Ryuuwon. With his new powers, Ryuuwon traps Satoru and the pirates in the cave before attacking the other Gokaigers and driving Insarn off. Back inside the cave, after Satoru points out to him that the adventure he and his crew share is a valuable treasure, Captain Marvelous remembers how he and Aka Red found the Bouken Red Key. Though Satoru feels they need to destroy the Precious, Captain Marvelous has another idea as he and Luka blast their way out and come to their crew's aid. When their usual attacks have no effect, the Gokaigers change into the Boukengers with Gokai Red managing to rip the Heart of Hades out of Ryuuwon and throw it to Satoru. But as Ryuuwon still poses a threat due to the residual effects of the Precious, Gokai Silver enters Gold Mode and defeats him with the Gokai Legendream Final Wave. However, it causes Ryuuwon to enlarge into a mindless monster as Gokaioh and Goujyu Rex fight him. After the Dekaranger and Magiranger Keys prove ineffective, the Gokaigers use the Boukenger Keys to unleash an image of DaiBouken, attacking Ryuuwon before fading away with its GoGo Sword used by Gokaioh to destroy the villain with the Gokai Adventure Drive. As the Gokai Galleon sails off, with Captain Marvelous ending up in another argument with Navi, Satoru watches the departing vessel while wondering if this is what Aka Red wanted.