. . . . . . . "Human"@en . "Alvin Wiener was a member of the failing rock band called Def Potato. He impersonated the Guitar Ghoul, trying to ruin the reputation of the competition."@en . "Scooby-Doo! Unmasked"@en . . . . . . "Black"@en . "Brown"@en . . . . . "Musician"@en . . "Alvin Wiener was a member of the failing rock band called Def Potato. He impersonated the Guitar Ghoul, trying to ruin the reputation of the competition."@en . "Alvin Wiener"@en . . . "Male"@en .