Anthos is a warlock that appears in an episode of the Scooby-Doo Show called "The Warlock of Wimbledon". He was actually Nick, the tennis trainer of Jimmy Pelton in disguise, hoping to make Jimmy forfeit the game and lose his estate so that Nick and his brother could buy it. He later has a cameo as one of the costumes in the Coolsonian Criminology Museum in Scooby-Doo 2: Monsters Unleashed.
Anthos, the third costume on the right hand corner.