Lesson 45: Pikīn! Showdown of Destiny

'''Pikīn! Showdown of Destiny''' is the forty-fifth episode of Engine Sentai Go-Onger.

Plot
After being mortally wounded by the attack Long intended for Jyan, Suugu/Dan pleas Jyan to kill him. Though reluctant, Jyan deals the deathblow, freeing Dan from his physical form as he tells Jyan to continue his own path, departing into the afterlife. As the others and Xia Fu arrive to comfort a devastated Jyan as he decides to honor his father's wish by fighting Rio, who leaves Rin Jū Hall after feeling a strong surge of Ki, believing it to be Jyan's, only to learn that it's Gou, who had mastered the Heaven and Earth Disaster Strike with intent to settle things. However, Gouyu arrives to protect Rio, only for Geki Violet to easily kill him with the Heaven and Earth in three seconds, receiving Rio's attention. Once in Mythicla Beast King Form, Rio and Gou resume the fight that started a decade ago, with Rio easily defeating Gou (the Heaven and Earth Disiaster not working against Rio because he figured out how to counter after seeing it used on Gouyu) and giving him a reality check that they'll never be rivals. Jyan arrives after the fight to end his battle with Rio once and for all, fighting in their most powerful forms, with Rio holding the upper-hand. But while Super Geki Red and Rio have their final battle, Mere arrives too late to stop the fight as Jyan defeats Rio, causing Rio to awaken as the true Gen Jū King Long has envisioned: the mindless Destroyer bent on destroying everything. Though he easily defeated SaiDaiOh after enlarging himself, Mere manages to snap Rio out of it to Long's dismay, returning to normal. After revealing what she learned from interrogating Sanyo, that Long's been using them, Mere takes Rio away with Long pursuing them.