Madcap the Killer Clown

Madcap the Killer Clown was the disguise of Oopsy, who did it out of revenge against Lars Harmon for trying to sell Loony Park.

Physical appearance
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Personality
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Season one
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Appearances

 * Be Cool, Scooby-Doo!
 * 124. (no lines)

Notes/trivia

 * Even though the real Madcap wasn't technically a monster, the fake one was some kind of monster.