Kip. 6: The War of the Undies and Vests, Baby

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The Aloha Oe is attacked while passing through a no-fly zone around the destroyed planet Eden and lands on its surviving, barren moon. While exploring the surface, Dandy and Meow encounter an Undie alien wearing only underwear, and a Vestian alien wearing only a vest. The aliens reveal that their races have been at war for ten thousand years because the Undies do not tolerate vests while the Vestians abhor underwear, and now they are the only individuals left from each race. After fighting each other because of the aliens, Dandy and Meow convince the aliens to sign a peace treaty. However, according to galactic law, both aliens are obliged to relinquish their most prized possession, their clothing, to the other to seal the treaty. Unable to do so, the aliens fight each other to the death. Before dying, both aliens fire weapons of mass destruction to obliterate the moon. Dandy and Meow manage to escape the moon when QT tosses a space surfboard for them to surf their way out over the debris. (Source: Wikipedia)