* AccidentallyAccurate: That chattering sound Perry makes? Platypi really ''do'' make [[http://www.youtube.com/watch?v=dsd7ZfdZcNU those noises]] in real life (though of course not with their teeth, which they don't have).
* ActorAllusion: Ferb's PrecociousCrush on Vanessa Doofenshmirtz is a callback to the actors' previous roles in the movie ''Film/LoveActually,'' where Thomas Sangster's character had a similar crush on Olivia Olson's character.
** Candace's voice actress Ashley Tisdale is Photoshopped over Candace for her part in "The Curse of the Princess Monster".
** When Candace competes against Wendy for a job at Mr. Slushy Burger, Wendy is voiced by Brenda Song, who worked with Tisdale on ''Series/TheSuiteLifeOfZackAndCody''.
*** And, in "Phineas and Ferb Hawaiian Vacation" we have Phil Lewis voicing [[Series/TheSuiteLifeOfZackAndCody a hotel manager attempting to stop the brothers' antics]].
** "Picture This" introduces Baljeet's uncle Maulik, named after Baljeet's voice actor Maulik Pancholy.
** In "Phineas And Ferb Musical Cliptastic Countdown" the show was hosted by Major Monogram and Dr. Doofenshmirtz, who are both voiced by the creators.
** In "Nerds of A Feather", Doof pitches a show to a man named [[Creator/SethMacFarlane Jeff MacGarland]].
*** Which makes it even more funny to anyone who knows the creators well enough to get the "I got my own show!!" jokes. For those who don't, Doofenshmirtz's voice actor (the show's executive producer) used to work with [=MacFarlane=] on ''WesternAnimation/FamilyGuy''.
** In "Ladies and Gentlemen: Meet Max Modem!", Linda mentions that she only lip-synced "I'm Lindana and I Wanna Have Fun". The person who actually sings that song isn't the same person who voices Linda. (it's Olivia Olson, who voices Vanessa)
** Richard O'Brien, who does the voice of the boys' dad, is best known for his role in ''RockyHorrorPictureShow'' and is very confused when the horror film he's watching has no rock and roll musical numbers.
*** In the same episode, the ''Literature/{{Twilight}}'' parody Candace sees casts MichaelJFox as a [[Film/TeenWolf werewolf]] and Creator/AnnaPaquin [[Series/TrueBlood as the Bella analogue]].
** [[LoonyFan Irving's]] brother is voiced by Diedrich Bader. This isn't the first time [[WesternAnimation/BatmanTheBraveAndTheBold he's dealt with a crazy fan]].
** In "Druselsteinoween", Vanessa attends her Halloween party [[WesternAnimation/AdventureTime dressed as a vampire queen.]]
** In "Phineas and Ferb Save Summer", one of the lyrics in Irving's song about why the woods are terrible is [[WesternAnimation/WanderOverYonder "banjo-playing hicks]] [[SelfDeprecation shouldn't be trusted".]]
*** The same episode has [[Series/TheTonightShow Jay Leno]] playing yet another character with his giant chin.
* AdoredByTheNetwork: Good gravy! During the time it's been running, it has had the full backing of Disney and there isn't a day that it's not showing on the network.
* AscendedFanon: [[http://thieviusracoonus.deviantart.com/journal/Swampy-Sent-me-Email-305578605#comments Stacy and Ginger are sisters.]]
** Jenny and Django are also confirmed to be siblings.]]
* ChannelHop: Sort of. From the second season onward, new episodes premiere first on DisneyXD as opposed to DisneyChannel since the show skews more towards the former's demographic, and are then shown a week or so later on DC branded as "all new".
** Well, sometimes a week or two. Sometimes ''six freakin' months''.
*** As of "The Wizard of Odd", new episodes premiere on DisneyChannel first again, but now they're labeled brand new when they premiere on DisneyXD.
* ExecutiveMeddling: One of the best positive examples of this tropes. The producers of the show asked to have a musical in every episode. So far, many of them have been ''really'' catchy and memorable.
** Disney also suggested to create characters that would become Isabella and Baljeet, both of which are quite popular.
** One executive suggested that Perry should get a girlfriend, only for the creators to say that he is "married to his job". This was even made fun of in the episode "Nerds of a Feather".
* FandomNod: In "What a Croc" the fan ship of Ferb/Gretchen got a brief nod after three nearly three seasons of extremely minimal interaction between the two characters. Although the nod itself was very brief, featuring both sharing a jetski after showing Phineas and Isabella quite happily doing the same.
* HeyItsThatVoice: [[HeyItsThatVoice/PhineasAndFerb Has its own page, now!]]
* IKnewIt: "For Your Ice Only" confirms what many fans had been suspecting for a long time: [[spoiler: Stacy and Ginger are sisters.]]
* {{Jossed}}: A recent NY Times panel had Dan and Jeff finally putting the bed the identity of Phineas' real father...[[NoExceptYes kind of]]. They admitted that it was ''not'' Doof (thus throwing a loop in many a viewer's theory on the real parents).
* MissingEpisode: "Ready for the Bettys" was pulled from the broadcast rotation in the United States after a band from New York with the same name thought they were copying them, according to [[https://twitter.com/alikigreeky/status/237977819576168448 one of the writers of that episode]]. This caused the episode it was paired with, "The Flying Fishmonger", to be removed as well. The episodes are still available on {{Netflix}}, iTunes, and Amazon Instant.
* NamesTheSame: The fact that Vanessa shares her first name with Vanessa Paradis might be why her boyfriend is named {{Johnny| Depp}}.
** Plus, we're just waiting for Stacy to [[Creator/AyaHirano sing]] "[[LightNovel/HaruhiSuzumiya Hare Hare Yukai]]."
* NonSingingVoice: Played with in "Summer Belongs to You"; when the first song begins, we hear a voice that is obviously not Phineas singing as we pan up a body dressed in Phineas's clothes...and then we find out that it's Clay Aiken, dressed in Phineas's clothes. And then Chaka Khan dressed in Ferb's clothes enters.
* OneOfUs: Dan Povenmire and Jeffrey Marsh are very aware of the large community/following that the show has. Marsh is a known contributor to the P&F Wiki, and they have confessed to at least being aware of this very site.
* TheOtherDarrin: JohnDiMaggio voices Johnny in "Dude, We're Getting The Band Back Together". In "Brain Drain", he's voiced by [[ImInTheBand Logan Miller]].
* PlayingAgainstType: Mrs. Johnson is pretty much the opposite of [[JerkAss the type of character Jane Lynch normally plays]].
** Creator/ClancyBrown as SantaClaus.
* [[NamesTheSame Title's the Same]]: ''[[WesternAnimation/MyLittlePonyFriendshipisMagic My Little Pony: Friendship is Magic]]'' and ''WesternAnimation/ThePenguinsOfMadagascar'' have episodes titled "It's About Time"; all three episodes deal with time travel in a sense.
* ScrewedByTheNetwork: Despite [[AdoredbyTheNetwork the exact opposite]]. Phineas and Ferb are subject to frequent marathons and specials across both of Disney's major channels, and they play a big part in a lot of the channel bumpers and advertising, but during the middle of Season 2 new episodes were subject to some severe ScheduleSlip, to the point where they would air in other countries months before the US premieres, which are about a month apart from each other themselves. The premieres have since been getting more regular since the start of Season 3.
* ShrugOfGod: The creators, when asked Phineas and Ferb's age; though the original pitch called them nine, this was retracted so that now they're merely "[[VagueAge less than fifteen]]".
** In "Quantum Boogaloo", however, they had to pick an age, so ten was given, as twenty years in the future Future Linda says that the boys are thirty years old. However, she may have been rounding; WordOfGod was that fans shouldn't necessarily take her literally.
* TooSoon: In-unverse. In "Let's Bounce," as his Lincoln robot betrays Doof, Doof cries out, "He's gonna John Wilkes my Booth!" Then he looks at Perry and say, "what, too soon?"
* TropeNamer:
** SquirrelsInMyPants
* RecycledScript: "Rollercoaster" and "[[MusicalEpisode Rollercoaster: The Musical]]," [[CaptainObvious obviously]].
** "A Hard Day's Knight" comes across as almost a remake of "Are You My Mummy?" with one stock adventure lit antagonist switched out for another.
* WordOfSaintPaul: Long before Candace and Jeremy were an established couple, Jeremy's voice actor commented that Jeremy liked Candace back. Of course, it really wasn't all that hard to figure out, but still.
* Both Marsh and Povenmire wrote for ''WesternAnimation/CatDog'' and ''WesternAnimation/RockosModernLife''. Both shows feature multiple minor characters with the name "Ferb."
* At least three different cast members from the ''RockyHorrorPictureShow'' have [[HeyItsThatVoice starred or guest-starred in the series at least once]]. Richard O'Brien (Riff Raff) plays the father, Lawrence. Barry Bostwick ([[strike:Brad Majors]] [[FanNickname ASSHOLE!]]) plays Phineas's grandfather. And, TimCurry (Dr. Frank N. Furter) guest-starred as a MadScientist in one episode. However, none of the characters nor their voice actors have interacted with each other as of yet.
** As of "The Last Train to Bustville", Lawrence and Clyde, the grandfather, have had one, very awkward, conversation on camera.
* Also at least 3 ''{{Lexx}}'' guest stars: Barry Bostwick (Thodin), Creator/TimCurry (Poet Man), and Creator/MalcolmMcDowell (Yottskry the Divine Cleric).
* Phineas and Ferb made a guest appearance in a recent episode of ''Series/ExtremeMakeoverHomeEdition'' in which they build a shrink ray to help Ty Pennington destroy a house. And yes, it is [[CrowningMomentOfAwesome kickass]].
* Unlike most other shows, the cast does not record the scenes in the same room or even at the same time. Vincent Martella (Phineas) claims to have waited 2 years before meeting Thomas Brodie Sangster (Ferb) in person.
* TheWikiRule: [[http://phineasandferb.wikia.com/wiki/Phineas_and_Ferb_Wiki The Phineas and Ferb Wiki]]. [[OneOfUs Jeff "Swampy" Marsh is a regular contributor]].