Ranma ½: Season 1, Episode 66

1 - 66: Ranma Gets Weak!

Furious at Ranma for delivering him into the hands of a mob of angry women, Happosai brands Ranma with ancient mark, causing him to become 'as weak as a mere babe'. Upon hearing this, his enemies start lining up to give him a beating... What's poor Ranma to do?