Hollywood is a district of Los Angeles, California, famous for its association with movie-making. The gang has been there on several occasions.
The Scooby-Doo Show
Scooby-Doo's cousin Scooby-Dee, a movie actress, was threatened there by the Ghost of Milo Booth. (The Chiller Diller Movie Thriller)
Scooby Goes Hollywood
Scooby-Doo tried to join various productions. (Scooby Goes Hollywood)
Scooby-Doo and Scrappy-Doo (first series)
The Neon Phantom appeared at the Hollywood Bowl and cut out the electricity. (The Neon Phantom of the Roller Disco!)
The New Scooby and Scrappy Doo Show
The gang helped out as stunt doubles when the Gremlin threatened a movie set. (The Fall Dog)
The New Scooby-Doo Mysteries
The gang went on a Hollywood tour of Bananatoon Studios, and ran into the Monster Mutt. (A Scarey Duel With a Cartoon Ghoul)
What's New, Scooby-Doo?
The Faceless Phantom disrupted a movie being directed by Vincent Wong.