Scooby-Doo Shaggy Rogers Fred Jones Daphne Blake Velma Dinkley
Base of operations
Mystery Incorporated, often shortened to  Mystery Inc., are an amateur crime-solving group of friends. Their mystery solving began as  preadolescents in the city of Coolsville, and eventually across the globe.
For a complete list of Mystery Inc.'s associates, look
Mystery Inc./animated history
Mystery Inc./biographical account of comic appearances
Mystery Inc./biographical account of novel appearances
Video game history
Mystery Inc./biographical account of video game appearances
Origin of name
In 1969, they were simply known as "the gang," with the designation of an a proper name first appeared in 1977, in the Peter Pan read-a-long books (which also called them Mystery Incorporated), and comics published by
Marvel Comics. In 1988, when the gang appeared in the , they were called the A Pup Named Scooby-Doo Scooby-Doo Detective Agency, "borrowed" from the team name used in and The New Scooby and Scrappy Doo Show (which had The New Scooby-Doo Mysteries Scrappy-Doo, but largely no Fred or Velma).
Finally in 1998, they were officially recognized in animated form for the first direct-to-video film,
, as Mystery Inc. Following on from that, in the fourth film, Scooby-Doo on Zombie Island , they were both called Mystery Inc. and the Mystery Gang. They are rarely called Mystery Inc. in animated form, but Scooby-Doo and the Cyber Chase Scholastic and DC Comics regularly refer to them as such, including as Mystery Incorporated. In 2013, for the nineteenth film, , they were called Mystery Incorporated, which cropped up again in the twenty-fifth film, Scooby-Doo! Mask of the Blue Falcon , in 2016. The former may be largely down to its heavy use in the unrelated TV series, Scooby-Doo! and WWE: Curse of the Speed Demon , airing from 2010-2013. It was also used in the unrelated live-action films, Scooby-Doo! Mystery Incorporated (in 2004) and Scooby-Doo 2: Monsters Unleashed (on TV in 2010, and 2011 on DVD).
Scooby-Doo! Curse of the Lake Monster
They are rarely referred to as Mystery Inc., and there seems to be a general avoidance from writers to ever attempt to use it, instead opting to just call them the Scooby Gang or the Scooby-Doo Gang.