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  '''Petasos''' is a [[Negaverse monster|monster]] from the [[Negaverse]]. She worked for [[Neflite]]. In Episode 12, ''An Unnatural Phenomena'', Neflite charged Mr. Baxter's hat with dark energy, implanting Petasos's essence into it. Mr. Baxter, whose park was going to be demolished, is given the power to control animals, but as Petasos's essence makes him evil, he causes them to go crazy. When she came out of Mr. Baxter's hat, Petasos attacked [[Sailor Moon]] and [[Sailor Mercury]] by shooting vines from her hands and hair at them, but they were rescued by [[Sailor Mars]]. While attacking them again, she was stopped by [[Tuxedo Mask]], who stunned her, allowing Sailor Moon to destroy Petasos with Moon Tiara Magic.
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