You might enjoy Ranma season 5 episode 2.
Quote:
2: 'When a Guy's Pride and Joy Is Gone'
Once it's revealed that the Dragon's Whisker is in fact a powerful hair-growth artefact (and further that, without it, Ranma's hair will grow uncontrollably until he exhausts his life's supply), not only the four niku-men but also chrome-dome Happosai and Genma are out to get their hands on it. Of course, in the Ranma universe everyone eventually gets what's coming to them.
--From http://www.dvdtimes.co.uk/content.php?contentid=6625
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That was one I thought of off the top of my head...