When the Scooby gang visits a dude ranch, they discover that it and the nearby town have been haunted by a ghostly cowboy, Dapper Jack, who fires real fire from his fire irons. The mystery only deepens when it’s discovered that the ghost is also the long lost relative of Shaggy Rogers!
Unfortunately the movie Scooby-Doo! Shaggy's Showdown is not yet available on HBO Max.
| Sound | Michael McCuistion | Original Music Composer |
| Sound | Lolita Ritmanis | Original Music Composer |
| Production | Brandon Vietti | Supervising Producer |
| Production | Sam Register | Executive Producer |
| Editing | Steve Donmyer | Editor |
| Sound | Kristopher Carter | Original Music Composer |
| Production | Zahra Dowlatabadi | Line Producer |
| Sound | Kelly Ann Foley | ADR Editor |
| Production | Alan Burnett | Co-Producer |
| Production | Collette Sunderman | Casting |
| Sound | Michael Garcia | ADR Editor |
| Production | Jay Bastian | Executive In Charge Of Production |
| Sound | Patrick J. Foley | ADR Editor |
| Sound | Kelly Ann Foley | Dialogue Editor |
| Sound | Mark A. Keatts | Supervising Dialogue Editor |
| Production | Liz Carroll | Administration |
| Sound | Patrick J. Foley | Dialogue Editor |
| Sound | Michael Garcia | Foley Editor |
| Production | Ed Adams | Production Manager |
| Production | Bobbie Page | Production Supervisor |
| Directing | Matt Peters | Director |
| Writing | Doug Langdale | Writer |
| Writing | Candie Langdale | Writer |
| Sound | Mark A. Keatts | Supervising ADR Editor |
