Mr. Hubley is the owner of the La Serena Spa.
He wears granny glasses and has long gray hair in a ponytail.
He seems distracted; he can't get Shaggy Rogers's nickname right, for example. But he knows a great deal about aromatherapy, dinosaur legends, and even more about advanced hypnosis. Once he saw the broken sand statues of Scooby-Doo and Shaggy he mourned and said they were too young to die at their age.
Scooby-Doo! Legend Of The Phantosaur
Shaggy was a total wreck after an adventure with frightening puppets in a "haunted" house. Under doctor's orders he was supposed to avoid all fearful situations and mystery-solving. So the gang decided to go to La Serena Spa, in the least haunted town in America. Mr. Hubley welcomed them as guests at his spa before the spa was officially open to the public because of Daphne Blake's family connections.
He told them he would have made the spa bigger, but some people around him wouldn't sell their land. He laughed about the idea of dressing up as a ghost and scaring them off (this made him a possible suspect later on).
Soon, Shaggy needed help again after encountering a glowing dinosaur monster and going on a wild mining-car ride with Scooby-Doo. Mr. Hubley helped with aromatherapy (which was effective after Scooby added a Scooby Snack to the scents). He also told the gang about the legend of the Phantosaur, supposedly summoned by native Americans to drive out Spanish conquistadors, which turned on them instead.
Hubley had an advanced hypnosis machine with a hologram projector (he called it "Psycho-Luminescent Reprogramming", PLR). He hypnotized Shaggy to become fearless and unstoppable when he heard the word "bad," and to switch back to normal when he heard it again. Then he ordered Shaggy to forget everything; Hubley himself was affected by the hypnosis and he couldn't remember the key word for Shaggy.
In the end, he was asked to undo the hypnosis and make him back into plain old Shaggy. He did this, but the whole gang was in the room this time and they ended up all thinking they were Shaggy Rogers. They drove off that way into the sunset, still confused over who was the real Shaggy.