60 free Phineas and Ferb trivia questions with answers — entertainment quiz, new questions added Aug 2026.
54 free Phineas and Ferb trivia questions with answers. Phineas and Ferb ran for four seasons, two movies and a Marvel crossover before coming back for a fifth season in 2025, and it packed every episode with running gags worth quizzing on. This trivia covers the whole tri-state area: Perry's double life at O.W.C.A., Doofenshmirtz's childhood in Gimmelshtump, Candace's busting, Isabella's Fireside Girls, the songs that Disney demanded in every episode, and the behind-the-scenes story of two Simpsons layout artists who pitched the show for sixteen years. Early questions are for anyone who has watched the show with a kid or been one. Later ones get into voice casts, guest stars, the Spanish theatrical release and the length of Ferb's longest speech, so long-time fans have something to fight over. Every answer has been checked against Wikipedia's articles on the series, its characters and films, and each question shows its source once you have answered.
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Q 01What kind of animal is Perry, the boys' pet and secret agent?
A platypus
The creators picked an animal kids could not beg for at a pet store, and one so obscure they could make things up about it.
Q 02How many days of summer vacation do Phineas and Ferb have, according to the theme song?
104
The revival's opening was tweaked for a few episodes to 'There's another 104 days of summer vacation'.
Q 03In which fictional city do the Flynn-Fletchers live?
Danville
It sits in an unspecified tri-state area, the territory Doofenshmirtz is forever trying to conquer.
Q 04What is the name of the evil scientist Perry battles in almost every episode?
Dr. Heinz Doofenshmirtz
He is voiced by series co-creator Dan Povenmire, and almost every one of his contraptions ends in '-inator'.
Q 05What do the letters O.W.C.A., the agency Perry works for, stand for?
Organization Without a Cool Acronym
Its rival in the 2025 spin-off Agent P, Under C is A.N.A.T.H.E.M.A., an agency with an 'exceptionally memorable acronym'.
Q 06Who created Phineas and Ferb?
Dan Povenmire and Jeff 'Swampy' Marsh
They met as layout artists on The Simpsons and pitched the show for 16 years before Disney bought it.
Q 07What is Isabella Garcia-Shapiro's famous catchphrase?
Whatcha doin'?
She dislikes anyone else saying it, and she was named after Dan Povenmire's oldest daughter.
Q 08Isabella leads which scout-style troop?
The Fireside Girls
Troop 46231 was going to get its own spin-off series, but Povenmire confirmed in 2020 that it had been scrapped.
Q 09What is Candace's overriding goal in nearly every episode?
To 'bust' her brothers to their mother
Povenmire has admitted the boys' inventions are really the setting; the actual plot belongs to Candace, Perry and Doofenshmirtz.
Q 10Who voices Candace Flynn?
Ashley Tisdale
The show first previewed right after High School Musical 2, in which Tisdale played Sharpay.
Q 11What is the name of the boy Candace has a crush on and eventually dates?
Jeremy Johnson
He works at Mr. Slushy Burger and plays in a band called The Incidentals; the two start dating in 'Summer Belongs to You'.
Q 12Phineas and Ferb are related how?
Stepbrothers
The blended family reflected Jeff Marsh's own upbringing; the creators felt it was underused in children's programming.
Q 13What geometric shape is Phineas's head famously drawn as?
A triangle
Povenmire sketched a 'triangle kid' on butcher paper at a restaurant in South Pasadena, and triangles hide in the background of every episode.
Q 21What is the name of Doofenshmirtz's goth teenage daughter?
Vanessa
She knows all about her father's nemesis, and as a teenager in 'Act Your Age' she is dating Ferb.
Q 22Norm, Doofenshmirtz's giant robot, is designed to look like what?
A mild-mannered businessman
His catchphrase is 'The enemy of platypus is man', and he was fired from O.W.C.A. for not being an animal.
Q 23What is the name of Major Monogram's unpaid intern?
Carl
He comes from a family of unpaid interns and briefly ran O.W.C.A. himself in 'Phineas and Ferb Save Summer'.
Q 14Which band performs the theme song 'Today Is Gonna Be a Great Day'?
Bowling for Soup
The creators originally wrote a slower 'classic Disney' number, but the network asked for a rock version.
Q 15Which stock question, usually answered 'Yes, yes we are', gets asked of Phineas by adults every episode?
'Aren't you a little young to…?'
A Mount Rushmore park ranger asks it while the boys are carving Candace's face into the monument.
Q 16What accent does Ferb speak with?
British
Marsh had lived in the UK for seven years and cast Thomas Sangster; Ferb went 28 whole episodes without a single line.
Q 17Who replaced Thomas Sangster as the voice of Ferb from the 2020 movie onward?
David Errigo Jr.
He had already voiced Ferb in the Milo Murphy's Law crossover.
Q 18From which fictional European country does Doofenshmirtz hail?
Drusselstein
His flashbacks return to the village of Gimmelshtump, where his parents once made him serve as the family lawn gnome.
Q 19What was Doofenshmirtz's job before he became an evil scientist?
Bratwurst street vendor
He blames the hot dog industry for putting him out of business.
Q 20Doofenshmirtz's younger brother Roger holds what job?
Mayor of Danville
Heinz insists Roger is their mother's favourite and once wrote a song about it, 'My Goody Two-Shoes Brother'.
Q 24Which secret agent temporarily replaces Perry as Doofenshmirtz's nemesis in 'It's About Time!'?
Peter the Panda
Both Perry and Doof end up depressed without each other; Doof has called Perry his best friend.
Q 25What kind of pet is Pinky, Isabella's animal who is also a secret agent?
A chihuahua
Agent Pinky answers to Admiral Wanda Acronym and fights Professor Poofenplotz, an obsessive collector of clown hairspray.
Q 26Baljeet moved to the tri-state area from which country?
India
He and Buford sing a duet describing each other as 'frenemies' and 'my least favorite brother'.
Q 27Linda Flynn-Fletcher was once a one-hit-wonder pop star under what stage name?
Lindana
Her hit was 'I'm Lindana and I Wanna Have Fun', a wink at Cyndi Lauper.
Q 28Lawrence Fletcher, Ferb's dad, is voiced by the creator of which cult musical?
The Rocky Horror Show
Richard O'Brien's Rocky Horror co-stars Tim Curry and Barry Bostwick were also invited to guest star.
Q 29Which song from 'Flop Starz' delighted Disney executives into asking for a song every episode?
Gitchee, Gitchee Goo
Povenmire and Marsh could write a song about almost anything in an hour and sang them onto composer Danny Jacob's answering machine.
Q 30Which made-for-TV film first revealed Perry's secret-agent identity to the boys?
Across the 2nd Dimension
It aired in 2011 and averaged 7.6 million viewers; Slash of Guns N' Roses co-wrote 'Kick It Up a Notch' for it.