For his uncle who owns Decade Records, see Mr. Decade.
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Ace Decade
Ace Decade
Vital Statistics
Alias Mr. Decade
Species Human
Gender Male
Hair color Dark brown
Eye color Black
Other Statistics
Affiliation Decade Records (formerly)
Family Mr. Decade (uncle)
Production Details
First appearance TSDS: The Diabolical Disc Demon
Played by Michael Bell

Ace Decade is the nephew of the owner of a music studio.

Physical appearance

Ace is a Caucasian male, with dark brown hair, and wears glasses.


Ace Decade is disloyal, sneaky, jealous and conniving.


The Scooby-Doo Show

Season three

Ace Decade unmasked

Ace unmasked.

Decade was smuggling records out of the studio in trash cans in order to sell them for personal profit. When a music writer, Tony Synes, 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, Synes 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.