References to Phineas and Ferb in other works.
- Adam:
- In one strip, the kids are seen watching "Lawn Gnome Beach Party of Terror".
- In another, Adam states his personal manifesto, which includes the belief that "Phineas is nothing without Ferb."
- In the This Time Round fic "The Two Davids (Reprise)", David Doctor (the High School AU version of the Tenth Doctor) is asked if he isn't too young to be in a pub and replies "Yes. Yes, I am."
- Chip 'n Dale: Rescue Rangers (2022): Linda makes a cameo selling cupcakes on Main Street. Phineas is also seen as a bootlegged toon after the Rangers save them all.
- I Funny: Jamie Grimm likes to pretend Phineas and Ferb are his classmates and Dr. Doofenshmirtz is his principal.
- Percy Jackson's Greek Heroes: When Perseus meets a man named Phineas, he says "What kind of name is Phineas? Sounds like a cartoon character."
- Tempest (2011): In Tempest Revealed, Mark and Moku watch Phineas and Ferb reruns together.
- The Daily Show with Jon Stewart:
- At the Rally to Restore Sanity and/or Fear, Jon Stewart calls the current media climate "the 24-hour political pundit perpetual panic conflict-inator".
- In August 2011, Stewart poked fun at candidate Michelle Bachmann's frequent appearances on multiple news programs, joking, "She went on ESPN's Sunday Night Baseball, Real Housewives of New Jersey, and ended the night by attempting to bust Phineas and Ferb."
- The "Perpetual Conflict-inator" joke returned in 2014, photoshopping an -inator behind Senator Mitch McConnell.
- In the 2011 Extreme Makeover: Home Edition episode about the Rucker Family, Phineas and Ferb appear in a quick animated segment and give Ty Perrington a shrink ray to destroy the old house.
- The Late Late Show with Craig Ferguson: The show is mentioned by Rob Morrow on the April 22, 2009 episode when he is talking to Ferguson about going on hiatus for the summer after the fifth Season of NUMB3RS, as he talks about the theme song, which Craig says he doesn't watch the show.
- Psych
- Shawn Spencer tells a British character that he learned his British accent from Phineas and Ferb's granddad. The British character is played by Malcolm McDowell, who actually plays Grandpa Reg.
- In a later episode, Shawn is being questioned at a crime scene, and tries to get out of it by claiming he has another place to be: namely, watching Phineas and Ferb marathon.
- The AOK series AOK Ruins Your Childhood has "Phineas and Ferb Start a Cult", where a now-25-year-old Phineas and Ferb start a cult in their backyard. Candace tries to report them to the IRS, and when that fails, she tries unsuccessfuly to show her mother. This plan is foiled thanks in part to Dr. Doofenshmirtz's salt-inator.
- Perry once made a cameo in Dork Tower
- Baljeet makes a cameo in Sluggy Freelance.
- The Monster of the Week strip based on "Theef" has Shaenon saying "If I Had a Nickel... for every time someone on The X-Files microwaved a cursed doll, I'd have ten cents. Which isn't a lot, but it's weird it happened twice."
- FU DW: In "DW RUINS CHRISTMAS", when Matt points out how in 2001, every African-American cartoon child character celebrated Kwanzaa,note he plays an AI-generated sound clip of Dr. Doofenshmirtz saying "If I Had a Nickel... for every Christmas cartoon in 2001 that had at least one kid celebrating Kwanzaa, I'd have five nickels, which isn't a lot, but it's weird they all came out the same year."
- The Nostalgia Critic:
- In his review of Diary of a Wimpy Kid, the Critic refers to Chirag Gupta as "That kid from Phineas and Ferb" as he shows him alongside an image of Baljeet.
- In his review of Jimmy Neutron: Boy Genius, during the scene where Cindy tries to cheer Jimmy up despite him dooming the Tri-state Area, the Critic says that Jimmy accidentally achieved what Dr. Doofenshmirtz never could.
- Schaffrillas Productions is a pretty big fan of the show. Besides the YouTube Poops he's done that reference it, it's crossed over to his reviews.
- Big City Greens: A Perry the Platypus stuffed animal is seen inside a claw machine in the episode "Present Tense". In fact, the other prizes in said claw machine are all characters from different Disney Television Animation series.note
- DuckTales (2017): The episode "The Dangerous Chemistry of Gandra Dee" opens with Gizmoduck fighting the Mad Scientist Dr. Atmoz Fear, who looks exactly like Doofenshmirtz (minus the fact that he's a bird).
- Family Guy:
- At the end of the episode "Movin' In (Principal Shepard's Song)", Chris pitches an erotic Phineas and Ferb fanfiction to a book publisher. He appears to really enjoy it.
- In another episode Stewie mentions Lois let him stay up past his bedtime to watch the show.
- Gravity Falls: In "The Inconveniencing", Wendy tells Dipper he is mature for his age, to which Dipper replies, "Yes. Yes, I am."
- MAD:
- The sketch "The Straight-A Team" features Phineas and Ferb as major characters. Perry also shows up at one point.
- The show is spoofed along with Dolphin Tale in the sketch "Dolphineas and Ferb Tale".
- In the My Little Pony: Friendship Is Magic episode "A Hearth's Warming Tail," Snowfall Frost (Played by Starlight Glimmer) steals a toy from Pipsqueak that looks a lot like Perry.
- SpongeBob SquarePants: In "Squid Plus One" when SpongeBob first appears, he says Isabella's famous catchphrase, "What'cha dooooooin'?"