Ranma's Greatest Challenge!

Ranma, Tsukiyo ni Hoeru (乱馬, 月夜に吠える) is the 2nd episode of the seventh season, Ranma Forever, of Ranma ½ and the 138th episode overall.

Relation to the Previous Episode
None.

Trivia

 * Chingensai from season three's Final Facedown! Happosai vs. The Invisible Man is one of the many participants in the Ogre Festival alongside Cologne.
 * The challenge is revealed to be a regular game played by Happosai, Cologne, Chingensai etc once in 10 years. However this would contradict the fact that Happosai was a new enemy to Cologne when they first met after he escaped his cave.