zyuohger:

With Bungray after Cube Whale, the Zyuohgers stay on their guard. Suddenly, a group of pirates called the Gokaigers attack them in an effort to steal the Whale Change Gun! Utilizing the powers of the Ranger Keys, the Gokaigers can transform into other Super Sentai! Since we’ve last seen them, the Gokaigers have obtained the Ranger Keys from the Go-Busters to Ninningers!

However, after Bungray resurrects past Sentai villains (Doukoku, Zed, Enter & Escape, Deboth, and Brajira), the Gokaigers team up with the Zyuohgers to defeat them. These villains are no match for the power of the Whale Change Gun and the Ranger Keys.