|This needs a stretch. (Feel free to remove when satisfied of completion.)|
* History in incomplete.
The Moat-Thing was the disguise of Yugor.
It's a dinosaur-like creature with green skin and darker green spots. It also has sharp teeth.
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Scooby-Doo (DC Comics)
Yugor dressed up as the Moat-Thing because he wanted to scare Dr. Errol away and take over his lab for himself.