Scooby-Doo and Guess Who?
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50 free Scooby-Doo and Guess Who? trivia questions with answers — trivia quiz, new questions added Oct 2026.
Scooby-Doo and Guess Who? brought back one of the franchise's oldest tricks: drop a famous face into a mystery and see what happens. From 2019 to 2021 the gang solved 52 cases alongside actors, athletes, musicians, comedians, scientists and even a few superheroes, in the spirit of The New Scooby-Doo Movies of the 1970s. This quiz covers the series the way fans remember it: who turned up in which episode, what was chasing them and where in the world it happened. The Batman and Wonder Woman crossovers get their own questions, as do the first episode, the actors who play Mystery Inc. and the story of how the cartoon was made and released. It is written for anyone who watched with their kids or grew up on Saturday morning Scooby, and many answers can be reasoned out from what you know about the guest. Every question comes with a short explanation, so you will pick up a few stories about the episodes along the way.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which sitcom character asks Mystery Inc. to find his missing robot in Chicago on Scooby-Doo and Guess Who?
Steve Urkel
Steve Urkel asks the gang to track down his Urkel-Bot before the robot-controlling Technomancer strikes. Jaleel White, who played him on Family Matters, returned to voice the character.
Q 02Which famous detective, or a man claiming to be him, joins Mystery Inc. in London on Scooby-Doo and Guess Who?
Sherlock Holmes
Sherlock Holmes, or at least a man who says he is, helps the gang chase the screaming skulls of English legend. The episode is titled Elementary, My Dear Shaggy!
Q 03Which Shawshank Redemption star investigates a haunted old prison on Scooby-Doo and Guess Who?
Morgan Freeman
Morgan Freeman joins the gang at a jail left empty for a hundred years and said to be haunted by the Ghost of Jean Lebeau. In The Shawshank Redemption he played the convict Red.
Q 04Mark Hamill voices which Batman villain when the Dark Knight guest stars on Scooby-Doo and Guess Who?
The Joker
The Joker has been Mark Hamill's best-known voice role since Batman: The Animated Series in 1992. The series also uses him as the Trickster and, in another episode, as himself.
Q 05Which actor, who played Shaggy in the 2002 live-action film, voices him on Scooby-Doo and Guess Who?
Matthew Lillard
Matthew Lillard took over as the cartoon Shaggy after Casey Kasem retired from the role in 2009. He went on to voice the character in three animated series.
Q 06Which game show host plays himself as Velma and Shaggy battle a robot contestant on Scooby-Doo and Guess Who?
Alex Trebek
Alex Trebek hosts as the pair play Jeopardy! against the robot Max Kilobyte, who turns on anyone who might beat him. The episode aired five days after his death in November 2020.
Q 07Which Olympic swimmer declined a Scooby-Doo and Guess Who? episode pairing him with the shark Jabberjaw?
Michael Phelps
Michael Phelps was the crew's pick to team up with Jabberjaw, Hanna-Barbera's talking shark, but he said no and the episode was never made.
Q 08What has Malcolm McDowell secretly built in a laboratory beneath his estate on Scooby-Doo and Guess Who?
A time machine
A time machine sits in his underground lab, built after years of research and now drawing the Chronobeast after him. McDowell himself played a time-traveling H. G. Wells in the 1979 film Time After Time.
Q 09Which famous duo spend a night in a haunted Las Vegas hotel with Mystery Inc. on Scooby-Doo and Guess Who?
Penn & Teller
Penn & Teller accept a millionaire's dare to stay overnight in the Savannah Hotel before it is demolished, facing the Ghost of Madds Markson. The magicians are longtime Las Vegas headliners.
Q 10Which DC hero leaves Mystery Inc. with no mysteries to solve by helping too well on Scooby-Doo and Guess Who?
The Flash
The Flash is Barry Allen, who only wants to hang out with Shaggy and Scooby at Big Belly Burger. His speed empties the case files until a sentient teddy bear plots to expose his secret identity.
Q 11Which voice actor, heard as Fred since 1969, also plays the title dog on Scooby-Doo and Guess Who?
Frank Welker
Frank Welker has voiced Fred since the franchise began in 1969 and added Scooby in 2002. On this series he also speaks for Speed Buggy and Magilla Gorilla.
Q 12In which country is Mystery Inc. on vacation when Wonder Woman appears on Scooby-Doo and Guess Who?
Greece
Greece is where the gang's holiday is interrupted and where Daphne and Velma are picked to fight beside Wonder Woman. Shaggy and Fred are stung at being left out.
Q 13Which monster of myth is Wonder Woman battling when she meets Mystery Inc. on Scooby-Doo and Guess Who?
A Minotaur
Q 21Where does Mystery Inc. help Mark Hamill rescue his drama teacher from a fox monster on Scooby-Doo and Guess Who?
Japan
Japan is the setting, where the fox monster's tracks lead to an old temple said to hold an ancient sword. The kidnapped man, Mr. Berle, taught the Star Wars actor drama in high school.
Q 22Which volcano is home to the fire monster hunting Steve Buscemi in Sicily on Scooby-Doo and Guess Who?
Mount Etna
Mount Etna looms over the trip, which he makes to visit his cousins. Locals keep mistaking the actor for a gangster because of his film roles.
Q 23Which microscopic animal appears in giant form to menace a space station on Scooby-Doo and Guess Who?
A tardigrade
A Minotaur is locked in battle with her when the gang wanders in, in an episode called The Scooby of a Thousand Faces! Scooby takes an instant liking to the Amazon hero.
Q 14Which creature from Batman's rogues gallery is blamed for a kidnapping on Scooby-Doo and Guess Who?
Man-Bat
Man-Bat seems to be the kidnapper, but the real one, scientist Kirk Langstrom, is still locked in Arkham Asylum. Someone else is wearing the wings.
Q 15Which Batman supporting character does Daphne call her uncle on Scooby-Doo and Guess Who?
Alfred Pennyworth
Alfred Pennyworth is treated as her uncle, so his disappearance gives the gang a personal stake in the case. It is the reason they team up with the Caped Crusader.
Q 16Which star of Batman: The Animated Series voices the Caped Crusader again on Scooby-Doo and Guess Who?
Kevin Conroy
Kevin Conroy became the voice of Batman in 1992 and came back for the crossover What a Night, For a Dark Knight!, the thirteenth episode of the first season.
Q 17Which NBA star has Shaggy as his caddy at a charity golf event in the Scooby-Doo and Guess Who? premiere?
Chris Paul
Chris Paul, then with the Houston Rockets, plays in a Florida tournament raising money for an arts school while a swamp monster stalks the course. It was the first episode released, in June 2019.
Q 18Whose ghost urges Mystery Inc. and a rival gang to cooperate near Gettysburg on Scooby-Doo and Guess Who?
Abraham Lincoln
Abraham Lincoln's ghost plays peacemaker when the gang clashes with the Funky Phantom crew over ghostly Civil War soldiers. The case takes them to Chambersburg, Pennsylvania.
Q 19Which musician's sleepaway camp in the Rocky Mountains is attacked by dinosaurs on Scooby-Doo and Guess Who?
Weird Al Yankovic
Weird Al Yankovic flags down the gang to warn them about a dinosaur wrecking his camp, and a second one soon joins in. The episode is called Attack of the Weird Al-Osaurus!
Q 20Which host of The View plays a student at a haunted mountain university on Scooby-Doo and Guess Who?
Whoopi Goldberg
Whoopi Goldberg is enrolled at a remote university that the gang must keep open so she can graduate, despite the Nightmare Ghost. She joined The View as its moderator in 2007.
A tardigrade, the tiny creature nicknamed the water bear, turns up enormous aboard a station whose crew has vanished. Real ones have survived exposure to outer space.
Q 24Which TV science host invites Mystery Inc. to test his experimental space voyager on Scooby-Doo and Guess Who?
Bill Nye
Bill Nye brings the gang aboard to try his new craft, only to find the crew missing. A tapped Morse code message leads them to astrophysicist Neil deGrasse Tyson.
Q 25Which stone creature attacks Gigi Hadid's Paris Fashion Week event on Scooby-Doo and Guess Who?
A gargoyle
A gargoyle swoops on the event, in an episode titled A Moveable Mystery! The carved figures are famous from the cathedral of Notre-Dame de Paris.
Q 26Which pop icon celebrates Scooby's birthday on a yacht attacked by shark men on Scooby-Doo and Guess Who?
Cher
Cher is on board when a pair of shark men attack the boat. It was a reunion of sorts: she and Sonny met the gang, and shark men, on The New Scooby-Doo Movies in the 1970s.
Q 27Which Lord of the Rings actor needs help recovering a lost key ring on Scooby-Doo and Guess Who?
Sean Astin
Sean Astin, the films' Samwise Gamgee, has dinner with the gang before the hunt leads to a hardware store and a plant monster. The episode is called Returning of the Key Ring!
Q 28Joseph Simmons, who asks for help with a haunted youth center on Scooby-Doo and Guess Who?, co-founded which rap group?
Run-DMC
Run-DMC is the group he founded, performing as Run. In the episode he wants to renovate a youth center, but the ghosts of two famous musicians stand in the way.
Q 29Which Star Wars actor teaches Mystery Inc. how to be cool on Scooby-Doo and Guess Who?
Billy Dee Williams
Billy Dee Williams, the saga's smooth Lando Calrissian, gives lessons at the Sky Town Cool School until a pterodactyl monster attacks.
Q 30Which half of the comedy duo Garfunkel and Oates voices Velma on Scooby-Doo and Guess Who?
Kate Micucci
Kate Micucci performs as Oates beside Riki Lindhome's Garfunkel. She took over as Velma when Be Cool, Scooby-Doo! arrived in 2015.