He was portrayed by Nicholas Hope.
Old Man Smithers was a janitor working at the Wow-O Toy Factory and had a crush on the factory's owner Pamela Anderson and decided to ask her out to which she turned him down. Furious over her rejection Smithers decided to dress up as the Luna Ghost and haunt the factory out of business as a method of vengeance. When Mystery Incorporated appears on the case they come up with a plan to trap the ghost only for the latter to kidnap Daphne, the plan is still set into motion however before Scooby and Shaggy accidentally mess it up after being mortified at the sight of the ghost. Fred ends up attempting to spray the ghost with a hose but unintentionally hits Velma instead knocking her over a balcony and coiling a chain around her leg, Fred himself then has a large net fall on top of him. The Luna Ghost continues to hold Daphne and chase Shaggy and Scooby before the two knock him into a large pile of packaged dolls rendering him unconscious.
Pamela, fans of Mystery Inc, the press and authorities appear on the scene and thank Mystery Incorporated for their hard work and
He also made a cameo in Scooby-Doo! Mystery Incorporated as one of the costumes in the museum. The Slime Mutant is the next villain after all the villains like the Luna Ghost
- Despite having very minimal screen time, the Luna Ghost quickly became a fan favourite and is one of the most highly praised parts of the 2002 movie.
- Although he was only the opening antagonist of the feature he was used in a vast majority of the marketing for the film and his silhouette preparing to attack the gang is present on nearly all of the home media releases and posters. This is likely because in most of the original drafts of the movie the Luna Ghost was supposed to be the main antagonist as opposed to Scrappy Doo and N' Goo Tuana.