Robert DeWayne Bob Papenbrook was an American voice actor. Fellow voice actors often nicknamed him Pappy. He was very well known in the worlds of anime and video game voiceovers for his voice acting of gruff characters. However, he was especially well known in his various liveaction voiceovers which, most notably, included the Power Rangers franchise. His bestknown roles included the voices of Rito Revolto in Mighty Morphin Power Rangers and Power Rangers Zeo, Shadowborg in Big Bad Beetleborgs, Scorpix in Beetleborgs Metallix, and Deviot in Power Rangers Lost Galaxy. Aside from acting, he also taught kickboxing and other martial arts.
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Source: Wikipedia