Lesson 49: Zun-Zun! The Beast Fist, for All Time...

'''Zun-Zun! The Beast-Fist, for All Time...''' is the forty-ninth episode of Engine Sentai Go-Onger.

Plot
After Long survives Rio's attempt on his life, the Gekiranger battle him for the sake of Rio and Mere, bent on defeating him in spite of the fact that he's immortal. Long assumes his fighting form and overpowers the Gekirangers before attacking the city to take on the task of destroying the world himself. The Gekirangers follow, but Jyan, Ran, and Retu are suddenly overcome as the Ringi Rio had placed on them earlier finally takes effect. The three find themselves in a dream version of the Rin Jū Hall, where Rio and Mere reveal the three Kenma in human form. The three Kenma then teach the Gekirangers to master their fighting styles and ultimate technique. Meanwhile, Gou and Ken battle Long on their own, losing to him until the seven Kensei arrive to restrain him in vain as obligated by their Jūken way. But Long breaks loose of their Geki Waza and defeat all seven singlehandedly. But Sha Fu reveals they were a distraction as the three Gekirangers arrive, mastering the Kenmas' power to finish Rio's plan and the means to defeat Long: bringing the two Jūken schools back into one. Combining their Geki with the Rinki Rio provided them, the three Gekirangers manage to turn the tables on Long, though he still isn't concerned because they can't kill him. The Gekirangers reveal that don't need to as they use the Ringi of Kenma, Dōkokugan, to seal Long away into a golden orb. After pondering on what to do with the sealed Long, Jyan suggests to be his jailer, with him, Ran, and Retu deciding to take their own students to ensure Long would never be freed. Three months later, both Ran and Retu become teachers, teaching the Jūken to their own pupils with Natsume as Retu disciple as Jyan gives them, Miki, and Xia Fu his goodbyes before taking his leave to see the world and teach the Jūken. He then visits Ken at SCRTC Meisters, and then Gou as he and Bae take their own leave to make up for lost time, before beginning his journey. Months later, while showing his skills to a group of children in Hong Kong, Jyan meets a boy who looks similar to a young Rio, taking him under his wing.