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Ace Decade is the nephew of the owner of a music studio.
He is a Caucasian male with dark brown hair and wears glasses.
Ace Decade is disloyal, sneaky, jealous and conniving.
The Scooby-Doo Show
Decade was smuggling records out of the studio in trash cans in order to sell them for personal profit. When a music writer, Tony Symes, realized his actions, Ace disguised himself as the Phantom and kidnapped Symes, locking him in a cupboard in the cafeteria.
Decade attempted to mislead the gang whilst they attempted to solve the mystery, leading them to a tape recorder wired to the intercom in his office in order to give the appearance he was being framed. However, Signs left a clue which was his ultimate downfall; his last piece of music spelled the culprit's name in the first three bars: ACE DEC ADE. (The Diabolical Disc Demon)