[[quoteright:1000:https://static.tvtropes.org/pmwiki/pub/images/this_is_your_bacstory.jpg]]
[[caption-width-right:1000: Sit right down, 'cause [[TitleDrop this is your backstory!]]]]

While Phineas and Ferb play an intense but otherwise mundane game of ping-pong, Dr. Doofenshmirtz tries to use the power of his miserable backstories to enhance his evilness.
----
!!This episode includes examples of:
* BeTheBall: Young Doof was once used as the ball for a carnival’s dunking booth.
* BehavioralConditioning: Doof's father briefly appears to say, ''"[[GratuitousGerman Bewegen Sie nicht!]]"''[[note]]Don't move![[/note]] and Doof immediately stands erect like a lawn gnome.
* BigNo: Doofenshmirtz does this when Perry shows pictures of the two of them together which reverses the Backstory-inator's effects and returns him to normal.
* BlatantLies: Remember how Doof claimed he "knew people" to have Love Händel appear in his backstory? That was just a lie. Turns out, he got them to play because he told them it was for Roger.
* BorrowedCatchphrase: At one point, Doof notices Agent P has escaped and says, "Hey, where's Perry?", marking one of the few times he doesn't call him "Perry the Platypus".
* BrickJoke: During one of his many flashbacks, Doof briefly mentions he was raised by ocelots for a while. Later, his EvilGloating is interrupted by an ocelot attacking him out of nowhere.
-->'''Norm:''' Oh, there’s Mama Ocelot!
-->'''Doofenshmirtz:''' Ironically, she’s still more nurturing than my own mother.
* BrownBagMask: After Doofenshmirtz chickens out of going off the high dive as a kid, the next scene shows his parents each wearing one of these out of shame.
* TheBully: Boris has been this to Doofenshmirtz his whole life, appearing in increasingly unlikely places to kick sand in his face. Ironically, the only place he doesn’t kick sand at him is at the beach, which makes Doof so [[ParanoiaGambit paranoid]] that he can’t enjoy his time there.
* ClipShow: Third one. This one focuses on Doof's many different backstories.
* ComedicSpanking: As the game show’s first special guest, Norm brings out the doctor who delivered baby Doofenshmirtz. The doctor promptly grabs Doof by the ankle, dangles him upside down, and spanks him once on the butt to make sure he’s breathing just like he did when he delivered him.
-->'''Dr. Shlussel:''' He is breathing!
** His mother does the same to him, however, unlike the doctor, she spanks him several times and appears to do it out of a desire to abuse him.
* CompanionCube: Doofenshmirtz’s best (and only) friend growing up, Balloony.
* ContinuityCavalcade: This episode combines nearly all of Dr. Doofenshmirtz's backstories, from [[Recap/PhineasAndFerbRagingBully the day he was born]] to his HilariouslyAbusiveChildhood to his many defeats at the hands of Perry the Platypus.
* CoolAndUnusualPunishment: Dr. Doofenshmirtz is forced to sit through a "digital remix" of his viral video from "Tip of the Day".
* CrackDefeat: Doof’s very first Inator lost to another kid at the Science Fair who made a baking soda volcano. The same thing happens the next year, and then again at a completely unrelated poetry contest.
* CreatorCameo: Vanna, the model, is voiced by assistant animation director Sue Perrotto.
* DaddyDidntShow: Parodied in that ''neither'' of Doofenshmirtz’s parents showed up to his birth.
* EvenEvilHasLovedOnes: All of Dr. Doofenshmirtz's pleasant memories are of his daughter Vanessa and his FriendlyEnemy Perry the Platypus. His memories of Vanessa nearly reset his Backstory-inator.
* EvilMakesYouMonstrous: When his Backstory-inator turns him more evil, Doofenshmirtz [[GrowingMusclesSequence transforms into a hulking monster]], suffering ClothingDamage in the process, and grows ScaryTeeth.
* FailureMontage: Two in this episode:
** A montage of Doof's failed dating life, set to "[[Recap/PhineasAndFerbChezPlatypus Happy Evil Love Song]]".
** And another of all his failed “inators”.
* FreudianExcuse: Dr. Doofenshmirtz plans to ''weaponize'' this by recapping all his miserable backstories to charge his "Backstory-inator" and make himself even more evil than before.
* FriendlyEnemy: Perry and Doofenshmirtz are such good frenemies that it’s their friendship that actually reverses the effects that the Backstory-inator had on Doofenshmirtz.
* FrivolousLawsuit: When Vanna gets stabbed in the shoe by the gnome’s pointed hat, she leaves limping and tells Doof, "I'm sending you a bill for the shoes. My boyfriend's a lawyer."
* GainaxEnding: It turns out that Phineas and Ferb's ping pong game was to gather enough kinetic energy to create a quantum vortex, which ends up sucking up everything in existence. Candace walks in the void and meekly says, "Mom?"
* GameShowAppearance: Doofenshmirtz is a contestant on the titular “This Is Your Backstory” show, put on by his own robot, [[GameShowHost Norm]].
* GoodTimesMontage: Two of them, when characters accidentally make Doof reminisce about positive memories.
** When Vanessa walks in, a montage of good memories between father and daughter is shown set to "[[Recap/PhineasAndFerbFindingMaryMcGuffin Not So Bad a Dad]]".
** When Doof evolves into a monster, Perry takes out a picture from his wallet of the two of them, setting off a montage of memories of them getting along set to "[[Recap/PhineasAndFerbItsAboutTime My Nemesis]]".
* GoofyPrintUnderwear: While being [[ItMakesSenseInContext spanked by Dr. Shlussel]], Doofenshmirtz’s pants sag and show his bright green and purple polka dot boxers.
* HighDiveHijinks: Jumping off the high-dive is a RiteOfPassage in Drusselstein, which Doofenshmirtz fails of course.
* HilariouslyAbusiveChildhood: From forcing him to be a garden gnome to blatantly [[ParentalFavoritism favoring his brother over him]] and even, absurdly, not showing up for his birth, it’s clear that Doofenshmirtz’s parents cared very little for him. He exploits this to give the Backstoryinator enough juice to make him more evil.
* InstantHumiliationJustAddYoutube: Doofenshmirtz’s incredibly embarrassing viral video of him roller skating in his underwear and falling headfirst into a toilet is shown again in this episode.
* MentalPictureProjector: The “This Is Your Backstory” game works by using memory extraction technology to project Doofenshmirtz’s memories onto a giant screen for everyone to watch.
* MusicalSlapstickMontage: Dr. Doofenshmirtz's backstories end with a montage of "failed -Inators" [[StuffBlowingUp exploding]] set to the [[Music/PyotrIlyichTchaikovsky 1812 Overture Finale]].
* NearVillainVictory: This was the closest Doofenshmirtz has ever gotten to ridding the world of his nemesis forever. If it hadn't been for Perry reminding him that they still have good times with one another despite being enemies, Doofenshmirtz would've won.
* NiceJobBreakingItHero: Perry kicking Doof out of his chair gives him one more humiliating memory that fully powers his -inator. Doof even thanks Perry for this.
-->'''Doofenshmirtz:''' Curse you, Perry the Platypus... and by "Curse you", I mean "Thank you"! (...) Remember two seconds ago when you foiled my latest plan? ''I do!''
* NoodleIncident: The only new clip made for this episode is the backstory of Doof's emigration to America.
* NothingCanStopUsNow: Doofenshmirtz says this almost word for word after activating his -inator; [[TemptingFate immediately after this]], Perry reminds him of the good times they had together which in turn reverses the Backstory-inator's effects.
* OhCrap: Perry has this reaction when he realizes he accidentally caused Doofenshmirtz to gain the final backstory needed to achieve his OneWingedAngel form.
* OnePersonBirthdayParty: One of Doofenshmirtz’s depressing childhood memories is throwing himself his own surprise birthday party at a SuckECheeses and being the only one who attends. To top it all off, the restaurant [[KickThemWhileTheyAreDown takes his cake back]] because they have a two person minimum rule.
* OrphanedPunchline: Candace tells Stacy she thinks the ocean would be deeper if it weren't for all the sea sponges.
* OutOfFocus: Phineas and Ferb spend the entire episode playing table tennis while Candace watches. Perry and Doof once again carry the whole episode.
* PowerMakesYourVoiceDeep: When Doof is transformed into a monster, his voice becomes deeper.
* ThePowerOfFriendship: When Doof becomes hulked out thanks to the Backstory-inator, Perry shows pictures of the two of them together, causing him to experience good backstories of the times they spent with each other and return to his normal self.
* RaisedByWolves: At one point in his childhood, Doofenshmirtz was raised by ocelots when his parents disowned him.
* ReadingTheStageDirectionsOutLoud: Norm does so on two occasions: before the diving board backstory ("Perform a segue back to rites of passage!") and after the Balloony backstory ("Uncomfortable transition back to the Gnome-O-Meter!").
* RecordNeedleScratch: Heard when Roger interrupts Doof's kickball flashback, because he is surprised that he got Love Händel to play his flashback. (See also: BlatantLies)
* RedFilterOfDoom: The inside of D.E.I. turns an infernal red when Doofenshmirtz hulks out.
* RidiculousRepossession: When Doofenshmirtz was a child, his family ran into hard times and experienced the difficult repossession…of their garden gnome.
* SadisticGameShow: The whole point of the “This Is Your Backstory” game show is to make Doofenshmirtz relive his most painful, humiliating, and miserable memories in order to fuel his Backstory-inator that will make him more evil.
* SeriesContinuityError: The ending of the flashback of Young Doof celebrating his birthday alone at [[SuckECheeses Guenther Goatcheese's]] (from "[[Recap/PhineasAndFerbRagingBully Raging Bully]]") ends with Doof saying that they took the cake away because of a two-person minimum. But the original episode had an additional scene of Young Doof walking home carrying the cake being attacked by doonkleberry bats, which served a plot point for the original episode.
* ShoutOut:
** The Gnome-O-Meter is based on ''Series/ThePriceIsRight'' game "Cliff Hangers."
** Norm’s LovelyAssistant is named Vanna, just like on ''[[Series/WheelOfFortune Wheel of Fortune]]''.
* StockAudioClip: Many of the backstories reuse their original narration. This is especially jarring during the [[Recap/PhineasAndFerbLawnGnomeBeachPartyOfTerror lawn gnome story]] when Doof's Eastern European accent suddenly becomes prominent again due to VocalEvolution.
* TakeOurWordForIt: Apparently, Ferb can't psych Phineas out with his dead-on impersonations of celebrities.
* TakeThat: "I was heading to a golden land of opportunity; a land with a pioneering spirit which welcomed misfits like me! But I ended up in America instead."
* ThingOMatic: The Backstory-inator
** We also see a flashback to Doof’s very first invention, named simply “Inator”.
* UnusuallyUninterestingSight: Charlene, despite her being CaptainOblivious to her former husband being an evil scientist, compliments Norm's tuxedo, indicating she has seen Norm before.
* ViewersAreGoldfish: At the beginning of Act II, Doof restates his scheme for the day.
* VillainousBreakdown: Doofenshmirtz throws one when Perry reverses the Backstory-inator moments before it's destroyed and the former returns to normal.
* VisibleOdor: Doofenshmirtz smelled so strongly of pork as a child that it’s shown coming off his body in wavy white lines.
* WantedASonInstead: Before Roger was born, Doofenshmirtz parents were expecting a daughter and made a ton of dresses in preparation. However, when they had a son instead, they made Doofenshmirtz wear the dresses they no longer needed for a whole year in order to save money.
* WholePlotReference: This episode is a parody of the 1950s documentary series ''This is Your Life'' with Norm taking on the Ralph James role.
----