Phineas and Ferb Crossovers
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Lost Little Vampire in Eclipse by Marissa Flynn reviews
In a trip to Seattle, Phineas gets bit by Victoria. Linda makes the decision to return home. The next morning, Phineas wakes up with fangs, pale and ice-cold skin. Feeling dangerous, he flees back to where it happened where he meets Victoria and joins her army of newborns, and he meets and befriends Bree. Takes place during "The Twilight: Saga Eclipse".
Crossover - Twilight & Phineas and Ferb - Rated: T - English - Suspense/Hurt/Comfort - Chapters: 8 - Words: 8,693 - Reviews: 47 - Favs: 17 - Follows: 15 - Updated: 10/16/2013 - Published: 6/6/2012 - Bree, Phineas
A New Summer by suddenlyperry reviews
Isabella is super excited about the visit from her bestfriend: Mable, who is staying with her for the summer. But it's a two for once deal, you get Mable and you also get her twin brother Dipper. With the two new arrivals, do some feelings change? And how much trouble will the twins have added in the group of fun-loving inventors?
Crossover - Phineas and Ferb & Gravity Falls - Rated: K+ - English - Adventure/Friendship - Chapters: 1 - Words: 1,156 - Reviews: 15 - Favs: 13 - Follows: 18 - Published: 10/15/2013 - Isabella, Phineas, Dipper P., Mabel P.
Phineas in the Beta House by Nickstar777 reviews
Phineas and Izzy are in college, make new friends and Phineas pledges the Beta House. Rated M for Sex, swearing and nudity
Crossover - American Pie & Phineas and Ferb - Rated: M - English - Romance/Humor - Chapters: 2 - Words: 1,139 - Reviews: 3 - Favs: 3 - Follows: 3 - Updated: 10/15/2013 - Published: 9/10/2013 - Isabella, Phineas
Platytouille by The Story Maker1 reviews
A platypus. They don't do much. But what if they DID do much. Perry wants to be so much more than an ordinary platypus, and when opportunity knocks, will he have the courage to disobey his family and follow his dreams? HIATUS
Crossover - Phineas and Ferb & Ratatouille - Rated: K+ - English - Humor/Friendship - Chapters: 1 - Words: 668 - Reviews: 2 - Favs: 1 - Follows: 2 - Published: 10/9/2013 - Isabella, Phineas, Perry
My Little Phineas and Ferb: Ponies in Danville by MathewSwift reviews
When she accidentally misuses her teleportation spell, Twilight, Spike and the Mane Six are transported to a place called Danville, where they meet two boys, who agree to help them. Meanwhile, Fluttershy gets a sudden surprise from a little platypus... Characters belong to Disney (Phineas and Ferb) and Hasbro (MLP: FIM)
Crossover - My Little Pony & Phineas and Ferb - Rated: K - English - Humor/Adventure - Chapters: 2 - Words: 2,613 - Reviews: 21 - Favs: 34 - Follows: 31 - Published: 10/8/2013 - Twilight Sparkle, Phineas, Ferb
Jaeger Ursprung by Allen Pierce reviews
This will probably never be finished. I'm leaving it up for posterity. Original summary follows below: "In retrospect, doesn't building giant robots to fight giant monsters sound exactly like the kind of thing Phineas and Ferb would do? Because as it turns out, that's totally how it started. This is going to take a lot longer than one summer day, though."
Crossover - Phineas and Ferb & Pacific Rim - Rated: T - English - Sci-Fi/Parody - Chapters: 1 - Words: 818 - Reviews: 5 - Favs: 12 - Follows: 22 - Updated: 9/28/2013 - Published: 9/25/2013 - Phineas, Ferb
A Tale of Two Geniuses by phineas81707 reviews
Lisa attends a fancy new school, and who should she meet but Phineas and Ferb? As she befriends them and the gang, she begins to have inner turmoil... ... ... The Power of Intelligence is considered this story, but, you know, going somewhere. It's a background story, for sure, but I will actually update it... even if it doesn't feel like it.
Crossover - Simpsons & Phineas and Ferb - Rated: K+ - English - Romance/Humor - Chapters: 5 - Words: 3,893 - Reviews: 5 - Favs: 5 - Follows: 5 - Updated: 9/20/2013 - Published: 8/6/2013 - [Lisa S., Phineas] [Maggie S., Ferb] - Complete
Fanfic convention by Techno Writer reviews
More info inside
Crossover - Fairly OddParents & Phineas and Ferb - Rated: K - English - Chapters: 1 - Words: 117 - Reviews: 3 - Favs: 3 - Follows: 2 - Published: 9/15/2013 - Complete
Phineas' Final Destination by Nickstar777 reviews
Phineas has a premonition of his friends dying on a cruise ship and saves them, but now the grim reaper is out for revenge.
Crossover - Final Destination & Phineas and Ferb - Rated: T - English - Horror/Hurt/Comfort - Chapters: 11 - Words: 7,440 - Reviews: 8 - Favs: 4 - Follows: 3 - Updated: 9/10/2013 - Published: 6/20/2013 - Phineas - Complete
The Cello Varsoom by AnnalovesElsa
The trio have dealt with three orgainzations and have their final battle with Professor Yew, and now are eager to go to the Kalos region itself. Their adventures there will begin, where they will fight Gym leaders and hope to make it to the League. Technically sequel to The Auspicious Cantercorn.
Crossover - Pokémon & Phineas and Ferb - Rated: K+ - English - Chapters: 1 - Words: 933 - Favs: 1 - Follows: 1 - Published: 9/9/2013
A Rip in Reality by Skia1717 reviews
All throughout time, there have been stories. The imaginings of authors, playwrites, and the like. Stories born of the hopes and dreams and ideas of ordinary people. But, what if, I told you they were all true? What if, perhaps, each of these stories, these places and characters, was real? And what if, one day the walls between them collapsed? What if, you were in the middle of it?
Crossover - X-overs & Phineas and Ferb - Rated: T - English - Romance/Adventure - Chapters: 3 - Words: 6,997 - Reviews: 1 - Favs: 1 - Follows: 1 - Updated: 9/8/2013 - Published: 9/2/2013 - Phineas, Isabella, Ferb
Cross Dimensional Visitors by kingofmusic reviews
*Sequale to New Girl in Town* Phineas and Ferb create a device to enter their favorite T.V, show "Gravity Falls" Meanwhile Perry the Platypus and his boss must team up to stop Dr. Doofensmirtz from spreading his evil to this new location.
Crossover - Phineas and Ferb & Gravity Falls - Rated: T - English - Adventure - Chapters: 5 - Words: 7,261 - Reviews: 12 - Favs: 12 - Follows: 8 - Updated: 9/8/2013 - Published: 8/31/2013 - Phineas, Ferb, Dipper P., Mabel P.
The Auspicious Cantercorn by AnnalovesElsa reviews
When Phineas, Ferb, and the neighbor girl across the street who has the beautiful name Isabella, find themselves in a world with Pokémon, they set out on a journey, soon to have to face off against three organizations, all after a different legendary in the Electric trio. Will they manage to stand strong? And is something more going on here than meets the ojo?
Crossover - Pokémon & Phineas and Ferb - Rated: K+ - English - Chapters: 4 - Words: 5,816 - Reviews: 4 - Favs: 3 - Follows: 2 - Updated: 9/7/2013 - Published: 1/13/2013 - Hydreigon
Phineas and Ferb: Indigo League Adventures by shecat105 reviews
Phineas and Ferb strive to be great Pokémon trainers. Along the way friends are made, rivals are challenged, and battles are fought. Along for the adventure, the boys' pet Poliwag, Perry, meets challenges of his own. And one man is bent on ruling the entire Region. Come on, three guesses. Who is the one man? Bet you can't guess it! Rating subject to change.
Crossover - Pokémon & Phineas and Ferb - Rated: K+ - English - Adventure/Parody - Chapters: 12 - Words: 20,626 - Reviews: 20 - Favs: 12 - Follows: 15 - Updated: 9/1/2013 - Published: 8/27/2012 - Poliwag/Nyoromo, Perry
Magic is Medicine by ficklepickle7 reviews
Pneumonia is the kind of thing that can ruin everyone's day. So when Perry comes down with a case of it, what would be the best way for him to get better? Medicine? Money? Moose saliva? XD What about magic from Dr. Turner's fairies? Read to find out! Also, this is mostly a Phineas and Ferb story, as Timmy and his fairies only appear once. Sequel to Perry's Old Girlfriend.
Crossover - Fairly OddParents & Phineas and Ferb - Rated: K+ - English - Friendship/Hurt/Comfort - Chapters: 1 - Words: 3,564 - Reviews: 3 - Favs: 4 - Published: 9/1/2013 - [Perry, OC] Timmy, Phineas - Complete
Hiding Lies by PFTones3482 reviews
Sequel to Mermaid Swapping. Dipper and Mabel come to Danville for a visit, and Major Monogram is getting more and more suspicious of Perry, Pinky and Carl. Will they be able to hide Candace's secret when no one else knows that they really need to? Rated for paranoia.
Crossover - Phineas and Ferb & Gravity Falls - Rated: T - English - Fantasy/Mystery - Chapters: 15 - Words: 28,749 - Reviews: 156 - Favs: 62 - Follows: 30 - Updated: 8/28/2013 - Published: 7/6/2013 - Candace, Perry, Major Monogram, Dipper P. - Complete
Phineas and Ferb's Temporal Teleporter by Project X-Over reviews
Otto, Tuddrussel, and Larry have to go back in time to make sure Phineas and Ferb keep inventing. Luckily, their visit gives Phineas and Ferb an idea, a teleportation device that summons famous people from the past. Meanwhile, Perry must stop Dr. Doofenshmirtz from teaming up with some of history's most infamous villains to take over the Tri-State Area.
Crossover - Time Squad & Phineas and Ferb - Rated: K+ - English - Humor/Friendship - Chapters: 5 - Words: 5,251 - Reviews: 2 - Favs: 8 - Follows: 1 - Updated: 8/24/2013 - Published: 8/5/2013 - Phineas, Ferb - Complete
The Lost Chronicle by chronofall
Seven years have passed, and almost nothing has changed for our favorite group from Danville. But when a sinister being threatens all they hold dear, they may find themselves racing through two worlds to face this threat... and deal with their inner demons in the process. Prologue up! Flame if you must. T for violence. UNDER MAJOR CONSTRUCTION (hiatus until further notice).
Crossover - Warcraft & Phineas and Ferb - Rated: T - English - Adventure/Friendship - Chapters: 1 - Words: 867 - Favs: 1 - Follows: 2 - Published: 8/19/2013
Dimsville by ficklepickle7 reviews
Perry gets sent to Dimmsdale by Dr. Doofensmirtz and he meets Timmy and his fairies. Meanwhile, Dr D. finally takes over the Tri-state Area. Will Perry and Timmy be able to stop him? Read to find out!
Crossover - Fairly OddParents & Phineas and Ferb - Rated: K+ - English - Adventure/Friendship - Chapters: 5 - Words: 4,453 - Reviews: 6 - Favs: 17 - Follows: 1 - Updated: 8/16/2013 - Published: 8/6/2013 - Timmy, Perry, Dr. Doofenshmirtz - Complete
Phineas and Ferb: Legends with The Dark Knight by AceOfKnaves reviews
Two worlds meet for the first time. Three freinds are separated, on three different sides of the battle lines, in Gotham City. Phineas' sanity hangs in the balance. Isabella is finally brave enough to make a move on him, with the help of a new friend. And Ferb finds someone who talks almost as little as he does? Romance later on. Rated T for for possible disturbing elements.
Crossover - Batman & Phineas and Ferb - Rated: T - English - Adventure/Romance - Chapters: 5 - Words: 16,811 - Reviews: 17 - Favs: 7 - Follows: 16 - Updated: 8/8/2013 - Published: 1/3/2013
Crossed by TheAfroCircus reviews
A trip to the Tri State Area for a Swap Meet turns into an adventure for Mabel and Dipper, meanwhile Stan has some competition and Agent P has two VERY unexpected new recruits. Gravity Falls/Phineas and Ferb crossover.
Crossover - Phineas and Ferb & Gravity Falls - Rated: K+ - English - Humor/Adventure - Chapters: 6 - Words: 9,526 - Reviews: 78 - Favs: 38 - Follows: 44 - Updated: 8/2/2013 - Published: 8/31/2012 - Perry, Dipper P.
Shadow of the Black Hole Army by Tyrant Overlord Killidia reviews
The Black Hole Army's been busy fighting the forces of Chaos in space for quite some time. However, it is not only time for this war to end, but also for Sturm to head back to a world that he visited to keep his end of a deal that he made in the past. The true identity of Phineas' father will also be revealed. This story is a Advance Wars/Phineas and Ferb/Warhammer 40k crossover.
Crossover - Advance Wars & Phineas and Ferb - Rated: K+ - English - Sci-Fi - Chapters: 7 - Words: 6,525 - Reviews: 3 - Favs: 1 - Follows: 1 - Updated: 8/2/2013 - Published: 7/2/2013 - Sturm
Two Worlds collide by Social fanfiction 20 reviews
Its SUMMER Timmy and his are bored so they go to a random demesion which is Phineas and ferb's Unverise,Timmy meets Isabella and after Phineas crushes isabella,Isabella falls in love with Timmy and its not good!Many pairings in this story!
Crossover - Fairly OddParents & Phineas and Ferb - Rated: K+ - English - Romance/Humor - Chapters: 2 - Words: 1,413 - Reviews: 1 - Favs: 5 - Follows: 5 - Published: 7/30/2013 - Timmy, Isabella
Fitting In by shopgirl152 reviews
With about three weeks left to go before the premier of Wander Over Yonder, Wander is feeling understandably nervous; all he wants is to fit in and have the viewers like him. Luckily, a certain red head happens by and gives the new guy a much needed pep talk. Phineas/Wander. one-shot.
Crossover - Wander over Yonder & Phineas and Ferb - Rated: K+ - English - Hurt/Comfort/Humor - Chapters: 1 - Words: 526 - Reviews: 8 - Favs: 21 - Follows: 8 - Published: 7/28/2013 - Phineas, Wander - Complete
Phineas and The AllStars Unite! by rigifan32 reviews
Phineas, Ferb, Candace and their friends from Danville and their new found friends the AllStars: The Powerpuff Girls, Dexter: Boy Genius, Action Dexter and Professor Utonium are making preparations for Isabella's birthday party. But a mysterious enemy has captured her for his evil plans. Can these heroes of Danville and Townsville team up and stop this evil plan?
Crossover - Powerpuff Girls & Phineas and Ferb - Rated: K+ - English - Adventure/Friendship - Chapters: 6 - Words: 6,154 - Reviews: 4 - Favs: 4 - Follows: 2 - Updated: 7/28/2013 - Published: 7/23/2013 - Phineas, Isabella - Complete
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