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The Scooby-Doo impostor was the disguise of M'Lady Moonbeam, a smaller dog wearing a Scooby-Doo suit with stilts.

Physical appearance

The costume almost perfectly resembles Scooby-Doo, except for being collarless, having bushy eyebrows and a harsh expression.


The impostor didn't do a good enough job acting like Scooby, such as not not talking, being fiercer, and not showing the same interests. This gave the game away to Shaggy Rogers.


What's New, Scooby-Doo?

Season two

M'Lady Moonbeam unmasked.

She was helping her owner, Meadow, who dressed up as the Cat Creature, to kidnap the Secret Six puppies from potentially winning a dog show.