The Scooby Snack Monster was the disguise of Penelope Bailey to scare off spies.
Sludge monster

Scooby Snack Monster

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.