Gokai Partner! is the episode 46 of Pirateger and tribute of Engine Sentai Go-Onger. This story was taken previously about the strange ox and two Beasts appeared in the nowhere else which is Rokai finally saw the legendary ox with two Beast Generals. Dillain thinking Rokai has actual real-life ox with two Beasts.
After the strange ox appeared in the nowhere, Rokai continues to follows the legendary red ox with two Beasts. Dillain surprised at Rokai who has something strange when he goes. While in Burajin's ship, Samuel calls Dillain and find out about the strange ox with two Beasts
- Sosuke revealed he married accidentally Akina because Samuel left his team. Also, because of Rokai, he was part Engine Human while he was young.