Ranma's Greatest Challenge!?

Sinopsis

Ranma and Happosai team up to conquer the Ogre Festival of the Dark. Happosai prepares Ranma personally for the match of his life. If Ranma loses The Ogre Festival of the Dark it will be the end of the Anything-Goes School of Indescriminate Grappling. Winning the tourney, the true horror of the situation is revealed.