At UAOH HQ, Goro Hoshino learns that the Earth Defense Force has been wiped out and the Changemen's Great Power taken as he tells his aide Momo Maruo that they must begin their own operation. On the Gokai Galleon, confused by Navi's fortune being "Uao" (sounding like "Wow"), the crew thinks it might have something to do with a roller coaster. They head to an amusement park for clues as they find Momo with a sign as she calls out for the Gokaigers. After she is formally introduced to the pirates by Gai, Momo reveals that she will give them the Ohrangers' Great Power in return for a series of menial tasks. The Gokaigers agree until the tasks start to wear on the others when Joe points out that Momo is hiding something from them. Confronting her, Momo reveals that she has been keeping the Gokai Galleon crew distracted so Goro can deal with Basco Ta Jolokia so he can get back the Great Powers that the privateer took. Elsewhere, Goro has contacted Basco to lure him into a trap with a trade which may provide intel on the coordinates of the Gigant Horse. As Goro's plan fails, with Basco's summoned warriors disarming the explosives laced around the building, Momo prepares to give the Gokai Galleon crew her team's power as ordered so Basco can not claim it. However, Captain Marvelous refuses to be given something that he intends to take by force as he and his crew arrive at Goro's location to help him. Deciding to let the Gokaigers fight their way, Goro and Momo stand aside as Basco has his warriors fight them. As Gokai Silver takes to Gojyujin to defeat Wolzard Fire and Zubaan, the rest of the Gokaigers assume the forms of the Ohrangers while receiving the team's Great Power. By using the Ohrangers' signature attacks, the Gokaigers manage to defeat the warriors as Gokai Silver gets the Ranger Keys before Sally can retrieve them. With no more Ranger Keys in his possession, Basco seems defenseless as he signals Sally to stand aside when Captain Marvelous charges him. However, Basco reveals his true monstrous form before easily crippling the entire crew. After revealing that he has the Great Powers of the Changemen, the Flashmen and the Maskmen, Basco spares the Gokaigers' lives so they can continue with their quest and make his job of getting the Greatest Treasure in the Universe easier.