Uncle John is a famous filmmaker from Italy.
Physical appearance[]
John is a middle-aged man with neck level gray hair, he wears a red cap and a brown coat over a yellow collared shirt.
Personality[]
He's a relatively good guy who was looking for help because of the Gladiator Ghost's special effect they were using for a movie has gotten out of control. He was later delighted on letting the gang in on being cast members on his film.
History[]
Scooby-Doo! World of Mystery[]
He called Daphne to bring the gang over to the Colosseum because of a bad problem on the schedule, as he reveals it to be their special effect - the gladiator, is out of control. Said special effect soon showed up and attacked, which caused him to run away.
After the gang solved the case, which turned out to be a special effects employee trying to ruin the films progress because John changed the screenplay and cutted the Gladiator Ghost's (who was a real movie star) role. He gave them a chance to be in his film as a token of gratitude.