Dr. Heinz Doofensmirtz is going through a dry spell after he stopped trying to take over the Tri-State Area, especially with his one-year ban from making inators on American soil thanks to a political mishap. Luckily for him, he gets an offer from an organization in Antarctica named Chaldea.
And as he and his archnemesis Perry the Platypus find out, they are about to be involved in some crazy magic.
Chaldea Evil Incorportated!
is a Fate/Grand Order and Phineas and Ferb crossover by UnderdogEmiya that is currently ongoing.
This fic can also be read on SpaceBattles.com here. It can also be found in Archive of Our Own here.
Chaldea's Evil Tropes!
- Adaptational Early Appearance: Wodime, Daybit, Pepe, Akuta, and Beryl are seen much earlier due to Doof entering Chaldea before Ritsuka's arrival.
- Adaptational Modesty: After finding out that Ushiwakamaru, Fujimaru's starting Servant who wears a Stripperiffic armor, is physically sixteen to seventeen years old, Dr. Doofenshmirtz drags her aside, then builds a Cloth-Inator to give her something more concealing, though he uses up all available power sources before Ushiwakamaru sticks with a black bodysuit underneath her revealing garbs - in short, her outfit in Type Lumina.
- Alas, Poor Villain: While the corrupt Servants of Fuyuki F need to be put down, it's made clear they only became this due to the mud from the Holy Grail. When Medusa, Heracles, and Artoria are put down, some small respects are given to them as they die.
- Arbitrary Skepticism: Olga Marie Animusphere is a magus and the leader of Chaldea, an organization dedicated to protecting human history through time travel and summoning Heroic Spirits. At Daybit's suggestion, she hires Dr. Heinz Doofenshmirtz to be one of Chaldea's replacement engineers and has reluctantly allowed secret agent Perry the Platypus to stay undercover as her pet and keep an eye on him. Yet despite all this, she dismisses the idea of two pre-teen boys from Heinz's hometown of Danville inventing all sorts of crazy contraptions as mere rumors, at least until she gets in contact with them during the Incineration of Humanity. In Olga Marie's defense, she at least has evidence of Doofenshmirtz's inators while Phineas and Ferb's inventions vanish at the end of each day without any lasting impact.
- Armor-Piercing Question: When Olga grows frustrated with Doofensmirtz and readies to fire him, Doof simply asks her a basic question: Was Marisbury a good father? To her surprise, and as Doof points out, for all the admiration she has for him, she cannot say if the feeling was mutual.
- Big Damn Heroes: After ending up in Singularity F, both Perry and Doof find themselves before a Servant and about to die. Through their cries for help and extremely good luck, they find summoning circles and end up summoning Alexander the Great and Atalanta to save them from death.
- Birds of a Feather:
- Heinz and Touko grow close in chapter 4 due to many shared traits, such as their past of being overlooked for their younger sibling and eagerness to experiment.
- Suggested by Iskandar as the reason that Heinz was able to summon him without an artifact since Masters tend to summon servants compatible with them without outside influence. Doofenshmirtz emphasizes his disbelief by pointing out the difference between them.
Heinz: How the hell are we compatible? If I am the geeky nerd, then you are the jock that picks me up, puts the garbage can in my head, and locks me into the locker! - Break Them by Talking: Upon Lev revealing himself as the mastermind of Chaldea's explosions, he then proceeds to cruelly reveal that every aspect of Olga's life, the hatred drawn to her, her hope in making a good Chaldea, everything was manipulated by him. Her only friend. By the time everyone from Singularity F returns, Olga has become catatonic from the emotional stress itself.
- Chekhov's Gag: After taking a liking to Doofensmirtz, Touko Aozaki leaves one of her puppet bodies behind in Chaldea so she doesn't have to travel 12 hours in a plane back to Europe. This not only lets her survive the Incineration of Humanity, but in chapter 10 she performs a Big Damn Heroes moment and scares the Demon Pillar Lev to not hurt Heinz or the other heroes.
- Comically Missing the Point: When Mash points out to Ushiwakamaru that Ritsuka is a bit ill about her cutting off her enemies' heads, the warrior nods in understanding... and promises to warn him when she brings a head.
- Commonality Connection: As Doof finds out, he and Olga aren't entirely different. That being, both had parents who were neglected them and that deep down they wanted acknowledgment and love from them. He also finds common ground with Touko on account both felt underappreciated and upstaged by a younger sibling.
- Covert Pervert: While Ritsuka is a respectful young teenager, even he can't entirely prevent his thoughts from commenting on Mash's 'armor' for the first time.
- Death by Adaptation: Outside of Perry and Doofenshmirtz, the entire Phineas and Ferb cast is hit by this thanks to the Incineration of Humanity.
- Did Not See That Coming: Considering the absolute rarity, aside from Wolf, Atalanta certainly didn't expect her Master to be a platypus.
- Downer Ending: Full stop with Chapter 10. Despite defeating all the corrupt Servants, felling Artoria Alter, and even driving Lev away, everyone in Chaldea discovers they're the only humans left on Earth. Doof, Perry, and Ritsuka enter a full Heroic BSoD while Olga goes catatonic from betrayal. It's not helped further when Doof and Perry find final messages left for them, leaving them crying by the chapter's end.
- Epic Fail: Hinako Akuta, an elemental spirit supposed to be inherently connected to the world and nature...thinks platypi are birds. She's rather baffled when she's corrected.
- Five-Second Foreshadowing: When Doofensmirtz talks with Vanessa, she admits that Dansville is experiencing small quakes for no apparent source. It's revealed later through Phineas and Ferb that these quakes originate from outside space and time and heavily imply that it is the beginning of the Incineration of Humanity.
- Good Parents: Doof is very much this, having raised his daughter quite well for all the antics he does.
- Heroic BSoD: During Vanessa's final message, she reveals that Phineas had likely entered this state after seeing his friends vanish and implied to have been the last of his family to survive. In Chapter 10, many of the main characters also enter this upon realizing their loved ones and friends are gone.
- Hope Spot: In chapter 5, Phineas And Ferb get through to Chaldea through Doofenshmirtz's phone call to his daughter Vanessa, sharing their space-time data to Olga-Marie about the Incineration of Humanity and their plans to replicate Chaldea's defense. Given the boys' track record in the show, many readers anticipated that they would be able to survive just like Chaldea. However, chapter 8 reveals that without the full context of the Incineration plus Chaldea's geographic location, Phineas and Ferb were only able to buy Danville just a bit of time before being erased like the rest of humanity, much to Heinz and Perry's despair.
- I Need a Freaking Drink: Olga Marie takes out a bottle of old expensive wine after realizing that Touko "The Red" Aozaki is "lovey-dovey" with Dr. Heinz Doofensmirtz, her current big headache. The narration adds that that glass she pours won't be the only one she's drinking that night.
- Insistent Terminology: Romani insists that he is Mash's guardian, even though it's obvious to everyone that he fills a fatherly role perfectly.
- Killer Rabbit: Despite Fou's small and cute appearance, Perry's instincts tell him the creature is more dangerous than he looks.
- Know When to Fold 'Em: Very downplayed with Iskandar in his life regarding Drusselstein. Despite his nature as an outgoing conqueror, he takes the warning from Delphi seriously to not invade the Eastern European country unless he wants an early defeat... at least until he conquers the rest of the world.
- Laser-Guided Amnesia: Subverted with Iskandar and Atalanta. Servants are not supposed to remember their past summons, but to their surprise, they can recall the events of Fate/Zero and Fate/Apocrypha respectively.
- That Man Is Dead: When Touko reveals her survival to Lev, she comments that she can't recognize any of the personalities she knows about. Lev just claims that the man she knew is gone for good - which the readers see occurring in Chapter 4 when all of his personalities become Demon God Pillar Flauros.
- Mood Whiplash: The story can start very humorous and become dark and dramatic before returning to its original tone.
- Not So Above It All: Dr. Romani is more than happy to have Beryl in a full body cast just for a broken leg and a fling few petty jokes as payback for Beryl breaking Mash's finger on a whim before the story.
- Oh, Crap!: Caster freaks out when Atalanta hears Berserker coming, and that Doofensmirtz and Iskander unwittingly pissed him off by appearing in his territory and Iskander breaking part of the Einzbern castle. Atalanta and Iskander share his reaction when she recognizes Berserker as her crewmate Heracles.
- Open Mouth, Insert Foot: In chapter 4, Da Vinci is already furious after watching The Da Vinci Code, and Romani only makes it worse when he mentions the book.
- Psychic Link: Contracted Servants and Masters can communicate with their thoughts. Despite being from different species, Atalanta can communicate with her Master Perry thanks to this link.
- Respected by the Respected: The reason that Doofensmirtz gets hired as a new engineer for Chaldea. He was recommended by Daybit, one of Team A's Masters and a respected magus.
- Sapient Pet: Perry is transferred to be Olga's pet so he can watch Doofensmirtz and make sure he doesn't accidentally blow up Antarctica or something similarly bad after getting hired by Chaldea.
- Sitcom Arch-Nemesis: Da Vinci initially resents Heinz after his upgrade to her coffee machine causes it to self-destruct. However, the two of them start a hot-blooded and intense rivalry once she finds out he's an eager inventor like her.
- Spanner Inthe Works: It's heavily implied that the reason Daybit requested Doofensmirtz to be hired is that the evil scientist and his logic-defying genius may discover a way to stop CHALDEAS from initiating its plan before Part 2.
- Spared by the Adaptation: Thanks to Norm taking Olga's place, she avoids getting killed by Lev's bombs during the first Rayshift.
- This Is My Human: Perry can tell that Fou cares deeply for Mash, and the unknown creature gets jealous of Mash has her attention on another cute creature. Perry can relate as he sees Phineas and Ferb as his boys, despite being different species and that the Platypus is their pet.
- The Worf Effect: Even when not in his Demon Pillar form, Lev Flauros managed to manhandle Iskandar and Ushiwakamaru with ease - one is one of the most famed kings and conquerors to ever exist and the other had Homefield Advantage active, meaning she was way stronger than usual.
- Villainous Legacy: Discussed by Major Monogram to Perry the Platypus after they find out that Heinz has been hired by the Chaldea Security Organization as an emergency engineer. Monogram reveals that Doofenshmirtz is a potential descendant of Malifishmertz, a rogue magus that terrorized Drusselstein in the 1800s. Fearing that Doofenshmirtz will be tempted to use magic for evil like his ancestor even after his Heel–Face Turn, Monogram assigns Perry to go undercover as Olga Marie's pet to keep an eye on his Friendly Enemy.
- Villain Reveals the Secret: As part of his plan to break their spirits, Lev Flauros tells Heinz, Perry, and Ritsuka that the Incineration of Humanity has claimed the lives of all humans outside of Chaldea, and their loved ones were among the casualties.
- Villain with Good Publicity: Despite Perry and Doof finding evidence that Lev isn't all he seems, the fact that he has a stellar reputation with everyone in Chaldea with a lack of evidence means that it's hard to believe he would be the mastermind behind the attack on Chaldea. His reputation only falls after he admits his crimes to everyone in Chaldea before leaving.
- Worse with Context: Played for Laughs with the reason that Doofensmirtz is banned from making inators on American soil for the next year, namely that he turned a governor into an elephant. The worst part is that the governor was a Democrat For Non-Americans
- You Have GOT to Be Kidding Me!: Perry the Platypus and Olga Marie are both flabbergasted when they see that Dr. Heinz Doofensmirtz and Touko Aozaki are taking a liking to each other in chapter 4. Olga takes up a bottle of old expensive wine at the idea that the Red is in love with one of her biggest headaches.
