Scooby-Doo (character)

Scooby-Doo, referred to simply as Scooby, (PROSE: Slow Decay) was a dog (PROSE: Secret of Arkatron) and, according to differing accounts, was either the eponymous character of Scooby-Doo, (PROSE: Slow Decay, etc.) or a real individual who visited Diagon Alley and the Land of Ooo. (WC: New Adventures Await!)

Biography
When Scooby-Doo visited Diagon Alley, he was given a belly rub by Ethan Hunt, as seen by Wyldstyle as she drove past on a motorcycle. Scooby-Doo later ran into battle alongside, among others, the Twelfth Doctor in the Land of Ooo, before winding up in a mosh pit with the rest of the battle's participants. (WC: New Adventures Await!)

Other references
In the sixth incarnation of Scooby-Doo, dating to the early 1980s, Scooby and Shaggy encountered real ghosts and vampires rather then men in masks. Scooby-Doo films from this era included The 13 Ghosts of Scooby-Doo, Scooby-Doo Meets the Boo Brothers and Scooby-Doo and the Reluctant Werewolf. (PROSE: Slow Decay)

Emma, when she believed the Handsome Doctor was going to die without hope of regeneration, likened him to Father Christmas, the Wizard of Oz, and Scooby Doo. (TV: The Curse of Fatal Death)

In 2007, Pete Tyler compared the Preachers to "Scooby-Doo and the gang," indicating that the series also existed on Pete's World. (TV: The Age of Steel)

Spotting a spooky house on a barren asteroid, Amy Pond commented "Scooby-Doo wouldn't be seen dead in there". The Eleventh Doctor replied "Scooby-Doo's a pussycat. Well, OK, I know he's a dog, but he's a scaredy-cat dog". (PROSE: Secret of Arkatron)

When the TARDIS struggled to dematerialise from the seabed of the Atlantic Ocean, the Eleventh Doctor put on an old diving suit to investigate. As he left, he told Freydis and Henrik "Now I will go and terrorise Scooby Doo". (PROSE: Dark Horizons)

In 2015, "a Scooby" was modern slang that meant "a clue." Andy Hansen used the term when she did not know how to get home after being transported back in time to ancient Greece. (PROSE: The Last Pharaoh)

Behind the scenes

 * What's New Scooby-Who?.jpgy-Doo originates from the franchise of the same name.
 * Scooby-Doo appeared as a playable character in LEGO Dimensions.
 * The line "Now I will go and terrorise Scooby Doo" in Dark Horizons is a reference to the Scooby-Doo villain, the Ghost of Captain Cutler, who appeared as a ghostly diver in an old-fashioned deep sea diving suit.
 * In response to a fan suggesting a story where the Doctor met the Scooby gang, the official Big Finish Twitter account posted an image depicting, among other things, Scooby-Doo with K9's head.