Mouse (Nowhere to Hyde)

The mouse lives in a hole in the wall of Dr. Jekyll's mansion.

Physical appearance
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Personality
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Season two
While searching in the attic for the Ghost of Mr. Hyde, Scooby-Doo and Shaggy Rogers saw a shadow. After Shaggy failed to open one door, Scooby tried to open another one, but he kept on finding a series of smaller ones as he kept going until he found mouse-sized one, angering the resident inside.

Appearances

 * Scooby-Doo, Where Are You!
 * 201. Nowhere to Hyde (no lines