Scooby-Doo! & Martin Mystery: Carnival Cruise Mayhem

:This article is about the film. For the DVD, see (DVD).
 is a 2021 Canadian-American animated direct-to-video spy action comedy film and the twenty-eighth in a series of direct-to-video films based upon Hanna-Barbera's Scooby-Doo Saturday morning cartoons, and also based on the cartoon series, Martin Mystery. It was released on DVD and Digital HD on February 14, 2021.
== Summary ==
== Plot ==
== Characters ==
Main characters:
*Mystery Inc.
**Scooby-Doo
**Shaggy Rogers
**Fred Jones
**Daphne Blake
**Velma Dinkley
*The Center Agents
**Martin Mystery
**Diana Lombard
**Java the Caveman
Other characters:
* M.O.M.
* Billy
* Jenni Anderson
Villains:
* Siren
* Fish Monsters 
** Dr. Marshal and Mei Mimanto
* Leviathan
* Venoso
== Locations ==
== Objects ==
== Vehicles ==
== Suspects ==
Suspect	Motive/reason
 	
=== Culprits ===
Culprit	Motive/reason
 	
== Cast ==
Frank Welker 	Scooby-DooFred Jones
Will Forte 	Shaggy Rogers
Grey DeLisle-Griffin	Daphne Blake
Kate Micucci 	Velma Dinkley
Samuel Vincent 	Martin MysteryBilly
Kelly Sheridan 	Diana Lombard
Dale Wilson 	Java the Caveman
== Notes/trivia ==
== Home media ==
* released by released by Warner Home Video on February 14, 2021.
== Gallery ==
== Quotes ==
Category:Scooby Doo
Category:Martin Mystery
Category:Crossover films
Category:Warner Bros. Animation
Category:Marathon Media
Category:Films
Category:Crossovers
Category:2021 films
Category:Direct-to-video films
Category:Sonic876 2.0's ideas
Category:35Baragon's ideas