141 The Allen Twins » by Alter Alyce Sebastian and Barry Allen are the twin sons of Henry and Nora Allen. After the incident, they were separated. Barry going the the Wests while Sebastian went to his godfather Alex Smythe. This is the story of what happened to the two young boys separated by a tragedy.
Flash & Glee, T, English, Humor & Family, chapters: 33, words: 81k+, favs: 399, follows: 369, updated: 12/10/2020 published: 6/18/2015, Barry A./The Flash, Sebastian S.
82 Facing Dragons » by Cosette 24601 When Susan runs off to Romania to get away from talk of magic and Narnia, she hardly expected to find dragons. But when a certain freckled red-head pulls her into another magical, dragon-filled world, she can't help but go along for the ride
Harry Potter & Chronicles of Narnia, K, English, Romance & Fantasy, chapters: 9, words: 13k+, favs: 221, follows: 337, updated: 7/23/2020 published: 5/28/2016, [Charlie W., Susan Pevensie] Molly W., Peter Pevensie
1k+Forgotten One » by nickijae Bludhaven officer, Dick Grayson knew that he could always count on his family no matter what. It was just kind of hard to depend on them when they and everybody else in the world had no clue who he or his alter ego was. Putting together the fractured pieces of his life would have been a lot easier if he hadn't been transferred to Gotham P.D.
Batman, T, English, Family & Drama, chapters: 20, words: 117k+, favs: 1k+, follows: 1k+, updated: 6/9/2020 published: 5/16/2018, Bruce W./Batman, Jason T./Red Hood, Richard G./Nightwing, Timothy D./Red Robin
281 The Doctor Is In » by HateIsRealAndItIsMe Will Solace and Nico Di Angelo have been living happily together for a year in New York City. When Will finds himself getting a job working for Miss Potts, both find struggles hiding their demigod tendencies from the observant woman and her cohorts. But what is going on with the unusual robberies and increased criminal activity in New York City? How are the monsters involved?
Percy Jackson and the Olympians & Avengers, T, English, Adventure & Romance, chapters: 9, words: 38k+, favs: 642, follows: 825, updated: 5/3/2020 published: 1/2/2017, [Will S., Nico A.] Pepper P.
479 Friends » by raspberry dreams Spencer & Tony meet post Plague/ Anthrax facing the challenges of dealing with the damage to their lungs together, they forge a firm friendship. The timeline of the shows has been changed so that the Criminal Minds episode 'Amplification' occurs a couple of weeks after the NCIS episode 'Swak.' I have also taken liberties with the length of time that passes between these episodes.
NCIS & Criminal Minds, T, English, Friendship, chapters: 21, words: 90k+, favs: 1k+, follows: 1k+, updated: 8/2/2019 published: 4/28/2017, Tony D., S. Reid
2k+ De-Aged » by The Bibliomaniac The Doctor and Jack have found themselves to be 11. Unfortunately, there is no easy fix, so the Doctor decides they should attend Hogwarts until they can find a way to return to their proper ages. Here, they make friends, confuse professors, and desperately try to avoid disturbing fixed points in time. Updates on a monthly basis.
Doctor Who & Harry Potter, T, English, Adventure, chapters: 88, words: 138k+, favs: 1k+, follows: 1k+, updated: 7/6/2019 published: 4/29/2013, 10th Doctor, Jack H.
61 And Then There Was Light » by DearlyFictitious The Avengers just recently added two new faces to their team and since then, no day has ever been boring. This is what happened on one of those days... Relationships if you squint. Rated for T for swearing. SPORADIC UPDATES.
Percy Jackson and the Olympians & Avengers, T, English, Humor & Friendship, chapters: 4, words: 8k+, favs: 243, follows: 230, updated: 5/16/2019 published: 8/15/2017, Percy J., Jason G., Iron Man/Tony S., Thor
402 Alternate Heroes: Arrowverse Vs Avengers » by silverwolvesarecool The archer, the speedster, the Kryptonian. All heroes in their own right. A mysterious incident brings them all to another earth with different heroes, they must put aside any differences to get to their own world again. But a threat threatens both earths and both teams must unite to fight the common enemy. The light? Only the tip of the iceberg of what is to come.
Flash & Avengers, T, English, Adventure & Suspense, chapters: 23, words: 129k+, favs: 482, follows: 526, updated: 3/30/2019 published: 12/15/2016
353 The Unwilling » by Poppy Allom Percy Jackson just wanted a break, a normal life. But the Fates weren't done with him yet. After Percy and Annabeth's break-up, he was living in New York with his mother. And then, once again, his world fell apart. Aliens invaded New York, and Percy wants revenge. DISCONTINUED.
Percy Jackson and the Olympians & Avengers, T, English, Supernatural & Adventure, chapters: 14, words: 35k+, favs: 1k+, follows: 1k+, updated: 3/20/2019 published: 9/23/2017, Percy J.
812 Alter Ego » by Deceptive Lies There were a number of times where Barry Allen had to switch into the alter ego he used in high school, Sebastian Smythe. This is a collection of the numerous times he had to do so.
Flash & Glee, T, English, Humor & Friendship, chapters: 27, words: 48k+, favs: 1k+, follows: 1k+, updated: 1/15/2019 published: 2/8/2015, Barry A./The Flash, Sebastian S.
348 Float » by Spiziri The end of the summer is rapidly approaching for our heroes, but Sally has one last adventure for Percy and Annabeth in Australia.
Percy Jackson and the Olympians & H2O: Just Add Water, T, English, Fantasy & Humor, chapters: 24, words: 101k+, favs: 456, follows: 473, updated: 9/7/2018 published: 5/13/2015
125 This way comes » by atomic muffin So, a magnificent Gryffindor, a gentle Ravenclaw, a just Slytherin and a valiant Hufflepuff walk into a magical castle...stop me if you already know that one. Reincarnated Pevensies at Hogwarts AU, Marauders Era. Post 'The Lion, the Witch and the Wardrobe' AU
Harry Potter & Chronicles of Narnia, T, English, Family & Friendship, chapters: 10, words: 61k+, favs: 484, follows: 583, updated: 6/2/2018 published: 5/10/2016, Edmund Pevensie, Lucy Pevensie, Peter Pevensie, Susan Pevensie
46 A Spy and A Superhero » by SeeSea22 If you put the two of them together you would see two boys- exactly alike down to the DNA. But if you took of one's shirt you'd see his torso covered in scars. The other boy would be covered in bruises. The two are secretive and hard to understand. The two boys are a Spy and a Superhero.
Alex Rider & Young Justice, T, English, Family & Adventure, chapters: 14, words: 28k+, favs: 64, follows: 71, updated: 5/22/2018 published: 11/12/2012, Alex R./Cub, Richard G./Nightwing
6k+Son of the Sea God » by Sassenach082 Zeus kills Sally Jackson with his master bolt when Percy is six months old, drastically changing Percy's life and the course of his future. AU.
Percy Jackson and the Olympians, T, English, chapters: 21, words: 72k+, favs: 13k+, follows: 13k+, updated: 2/17/2018 published: 11/17/2012, Percy J., Poseidon, Triton, Amphitrite
90952 Jump Street » by RedQ "You want me to do what now?" Barry asked. "We need someone to go undercover," Singh explained, "Someone to pose as a high school student, to get more information about the supplier." Barry snorted. "Very funny, sir," he said, "You had me going for a second there."
Flash, T, English, Humor & Family, chapters: 22, words: 84k+, favs: 568, follows: 635, updated: 12/16/2017 published: 8/4/2016, Barry A./The Flash, Iris W., Det. Joe W., Det. Eddie T.
73 The Wonders of Hogwarts » by lollipop70188 Percy, Annabeth, Thalia, and Nico go to Hogwarts. The Golden Trio are in their 7th year. This is just a story of them at Hogwarts. Harry will be jealous. There will be Percabeth and Solangelo. There will be some demigods at Hogwarts. I suck at summaries, sry
Harry Potter & Percy Jackson and the Olympians, T, English, chapters: 15, words: 16k+, favs: 69, follows: 83, updated: 8/8/2017 published: 2/11/2017
21 On Red Mist and Purple Force Fields » by Not An Apricot One day Wanda and Pietro are attacked while exploring, causing Wanda to use her powers in an unexpected way. Suddenly they're in Metroville, facing off against supervillains with two siblings with suspiciously similar powers to theirs. Also, someone has a plan that could threaten the safety of both of their worlds if they don't stop him. post-AoU, pre-CW. Alive!Pietro
Incredibles & Avengers, K+, English, Friendship & Adventure, chapters: 19, words: 33k+, favs: 39, follows: 29, updated: 8/4/2017 published: 7/31/2016, Violet P., Dash P., Wanda M./Scarlet Witch, Pietro M./Quicksilver
1k+ Call me Kara » by SpeedForce 1229 Betrayed by her own world and left for dead an old friend arrives to save Kara from death. Deciding she has had enough of risking her life for others, Kara starts a brand new life with new love and new friends, leaving Supergirl behind forever.
Flash & Supergirl, T, English, Romance & Adventure, chapters: 62, words: 635k+, favs: 2k+, follows: 1k+, updated: 12/3/2016 published: 4/11/2016, Barry A./The Flash, Kara D./Supergirl
413The Sea's Battle » by MoonTitanessSelene Percy's banished to Tartarus for killing six important demigods. She's stripped of her powers as a goddess and left to fend for herself. Olympus is under attack & the gods need her, so they bring her back. But Percy feels betrayed by them - especially her boyfriend, Ares. Will she help? Sequel to The Sea's Recovery. Can be a standalone. fem!Percy
Percy Jackson and the Olympians, T, English, Angst & Adventure, chapters: 11, words: 22k+, favs: 706, follows: 762, updated: 8/15/2016 published: 2/20/2015, Ares, Percy J., Iapetus
32 Attempting Normal: Let's See How This Goes by GinervaMarieChaseEverdeen After the events of C.A.W.S., Clint and Nat go to ground at one of their few secret safehouses. They were quickly getting bored when a couple named Oliver and Felicity bought the house next door. This is what happens when the Flarrow Xover pokes fun at superheroes in a farmhouse. There will be archery, fluff, hacking, Bratva, Lucky the Pizza Dog, and more in this epic adventure.
Avengers & Arrow, T, English, Romance & Drama, words: 4k+, favs: 53, follows: 93, 5/22/2016, [Black Widow/Natasha R., Hawkeye/Clint B.] [Felicity S./Overwatch, Oliver Q./Arrow/Green Arrow]