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Elmo Sputterspark, better known as MegaVolt, is a fictional character, a super-villain from the animated television series Darkwing Duck, produced by Disney. MegaVolt, an anthropomorphic rat, is voiced by Dan Castellaneta. MegaVolt is the most recurring villain of the series, appearing in nineteen episodes. He also is in the Darkwing Duck videogame.
– Darkwing Duck Wiki