Man-Bat serum

The serum is what transforms Dr. Kirk Langstrom into the monstrous, Man-Bat.

Physical appearance
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Early history
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Scooby-Doo! Team-Up
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Appearances

 * Scooby-Doo! Team-Up
 * #1. Man Bat and Robbin'

Notes/trivia

 * Dr. Langstrom implied that this isn't the first time he's been the Man-Bat, so the antidote may not be successful.