Mr. Grumper (The Quagmire Quake Caper)

Mr. Grumper is a seismologist.

Physical appearance
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Personality
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The New Scooby and Scrappy Doo Show
Insert details here. (The Quagmire Quake Caper)

Appearances

 * The New Scooby and Scrappy Doo Show
 * The Quagmire Quake Caper