The New Scooby Doo Mysteries

The Dooby Dooby Doo Ado (1x19)

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The gang heads to Las Vegas', Circus A Go-Go, tosee Scooby's cousin Dooby Doo in concert. Soon it seems someone is out to kidnap Dooby Doo and steal his fancy collar, which was a present form a fan in New yourk, so Scooby turns decoy with a fake collar. Looks like trouble!