Duck Guy was a favorite bathtub toy of Shaggy Rogers.
It looks like a regular rubber duck except that it has sunglasses and whisker stubble on the bottom of its bill.
While traveling in Hong Kong it got "totaled" by his battleship.
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The gang took it to the Ling Toy Co. to get it repaired, but it was eventually converted to a giant toy to fight the Dragon. Shaggy received a new duck from Mei Ling as a replacement and a sign of her affection.
- Rubber ducks are a running gag in The 13 Ghosts of Scooby-Doo, so this duck may be a tribute.