Trapped In Another World / Fan Works

• Abyssal Plain has the superhero and supervillain team of Breakthrough and Undersiders from Ward finding themselves in the Abyss from Pact. Bonus points for the teams to come from a universe without magic, now facing off against magical threats.
• Amazing Fantasy involves Spider-Man being forcibly transported to Izuku's universe by Mysterio's portal. There he's homeless, considered fictional, and is on the run from the police for his vigilantism. After seeing Izuku leap out of traffic the way he had as teenager, Peter decides to teach the newly spider-powered teen how to be Spider-Man while trying to figure out a way home.
• In the Slightly Damned fanfiction Blizzard Storm this is what kicks off the ENTIRE plot of the story. Of course, it's subverted starting from Chapter 17.
• Ben 10: Unlimited: This happens to Ben as he's trying to kill himself after Vilgax killed his family, best friend, and girlfriend. Professor Paradox instead sent him to the DCAU...just in time for the Thanagarian invasion.
• Boldores And Boomsticks revolves around Team RWBY being chased through an Ultra Wormhole into the Pokémon world. A later chapter reverses the situation, with an Absol careening into Remnant moments before another Wormhole snaps shut and joining Taiyang, Winter, Qrow, and Team JNPR in their quest to go after their lost friends and family.
• The Boys: Real Justice: Played with. On the same day that the Justice League appear in Earth 7's New York, the Boys all get sent to the DC Universe (being spread out to Gotham, Metropolis, Central City, etc). They quickly realize that there is a way to travel back to their home universe, but they decide not to take it so that they can prove themselves as vigilantes by taking out some of Batman's rogues. This ends as well as you think, and ends with Batman sending them all to Arkham, then Waller busting them out to put them on Task Force X (aka the Suicide Squad, and then leads to them being put under mind control by Lex Luthor. By then, they certainly want to go home.
• Ragna ends up trapped in Fiore in Bonds Beyond the Boundary. Kokonoe manages to link the gap between their worlds so Ragna can now leave when he feels like it. He refuses, as Terumi is in the Fairy Tail world and Ragna will be damned if he lets him roam around and cause havoc.
• The story Bring Me Back Home involves Marinette falling through a portal into an alternate Paris, based on the Miraculous Ladybug pilot video, forcing her to deal with a much less friendly Cat Noir than she's used to. In turn, Marinette's counterpart ends up in the familiar Paris, is forced to impersonate Marinette for the time being and quickly digs herself into a hole with Alya and Adrien by not realising that Chat Noir is much more popular than she's used to.
• Doors to the Unknown: This is the current situation Taylor, Dean, Chris, Brian, and Alec find themselves in. They adapt surprisingly well, but are still focused on returning to their home plan from Eberron.
• A Courier For Kivotos: A post-story Courier of the Mojave Wasteland finds himself in Academy City, Kivotos and becomes the Sensei to the trigger-happy angel-students.
• A Crown of Stars: Inverted with Shinji and Asuka. They had been travelling between two different universes when the portal got shut down while they were in their native homeworld, trapping them in there. Played straight with the Avaloni soldiers accompanying them that got trapped in the Evaverse.
• Cycle is a Fire Emblem: Awakening story whose Robin is actually a Canadian baker named Robin who happens to have played Fire Emblem: Awakening a few times... except she's not their Robin and both the mystery behind her abduction, as well as what has become of the actual Robin, are the Driving Questions of the plot.
• Played with in Dedicated Hearts made Fullmetal. The Truth dropped Edward and Alphonse Elric into the Attack on Titan world against their will, but left them the means to return to their own world at any point they wish (by drawing a specific transmutation circle). However, it's a one-way trip once they choose to do so, and since their mission is to save as many lives as possible (in exchange for bringing back their lost loved ones to life), they can't bring themselves to go back just yet, at least until they've stopped the Rumbling.
• Deltatraveler: Kris and Susie wake up in Undertale and look for a way home. Later on, they encounter Noelle and fall into a lot of other worlds..
• Demon In Fodlan: After his defeat at the hands of Chaldea, Goetia finds himself stranded in Fodlan for reasons unknown. Now human, Goetia decides to use this chance to learn why humanity rejected his aid and soon becomes unwittingly involve in the Officer's Academy. And it turns out that other Demon God Pillars managed to find their way to Fodlan as well, concocting their own schemes.
• Displaced (TheMountainJew): Spider-Man is dropped off in the DC Universe with no apparent way to return home.
• Dungeon Keeper Ami features this prominently — with something of a twist. The Light Gods are capable of sending Ami back at any time, and Ami is aware of this fairly early. However, due to Ami's unfortunate bonding with a Dungeon Heart, they refuse to do so. Rightly so — if she returned to her world with a Dungeon Heart, she would inadvertently draw the Dark Gods after her. The story evolves around her attempts to discover a way around this.
• Elemental Flux revolves around Calvin, Hobbes and Susie getting trapped in the world of Avatar: The Last Airbender.
• The Fairy Queen of Tilea sees Erza Scarlet, after losing to her mother Irene and seemingly sacrificing her life, somehow get transported into the nation of Tilea from the Warhammer world with no idea how to get back to Earthland.
• This is the premise of Fate Genesis; Sonic the Hedgehog and friends end up transported to Fuyuki at the beginning of the Fifth Holy Grail War thanks to one of Dr. Eggman's weapons going haywire. At the end of the story, Matou Shinji ends up stuck in Sonic's world.
• Fire Emblem Fates: Calamity: Many BlazBlue characters are trapped in the world of Fire Emblem Fates, and have all been stuck there for five years. To top it off, many characters, such as Ragna, Noel, and Bang, are all suffering from a case of Wistful Amnesia and don't remember their old world, believing themselves to be inhabitants of the Fates world.
• Freedom Fighters (Sonic x Freedom Planet): At the start, after Infinite's failed attempt to take the Chaos Emeralds (which results in their energy clashing with that of his Phantom Ruby), a rift gets torn between worlds. As a result, Sonic, Tails, Amy, Shadow, Eggman, and Infinite himself get sent into Avalice, with them having no idea how to get back home.
• Hearts of Ice: Akane is exiled to the Kami Plane by Cologne's magic, and she spends seven years fighting demons until she manages to return to her own plane.
• In Hollowtale, the Knight finds themself trapped in the world of Undertale, with no idea how to get back home. To help them adapt to the new world they found themself in, Sans and Papyrus decide to take them under their custody.
• If Wishes Were Ponies: Implied, then averted. Harry Potter, after being beaten almost to death by Dudley's gang, falls through a portal to Equestria. Despite the efforts of the Equestrian Guard, they can't relocate the portal. Fifteen months later, a Hogwarts owl shows up with his letter, revealing that the portal is still active. Harry is forced to admit that he's known the location of the portal all along, but he didn't reveal it because he loves his life in Ponyville and he was worried that he'd be sent back to the Dursleys if Twilight learned there was a way to send him back. Twilight quickly assures him that he'll never have to see the Dursleys again.
• Justice: All the Straw Hat Pirates are stranded in the Justice League universe and as such, they all try to blend in and avoid the heroes there while secretly trying to find a way back.
• This type of plot is oddly popular with Kamen Rider crossover fanfics, wherein various canon characters or OCs (notably fans of the franchise) would be transported to a fictional world of their choice with a Kamen Rider belt (regardless of which generation; some would use the main Rider powers although secondary/auxiliary Riders aren't too far off).
• In the MCU/Harry Potter crossover The Last Seidr, twelve-year-old Harry, Fawkes, and the Sorting Hat are zapped by the Tesseract from Hogwarts to the MCU right before Loki's attack on New York. Harry struggles to hide his magical abilities (as well as exactly what Fawkes is) from SHIELD while trying to figure out how the Tesseract can get he and Fawkes home.
• In Lord of the Mutants, the Fellowship get trapped in the world of X-Men, and end up tangling with the Brotherhood of Evil Mutants. The sequel has the X-Men get stuck in Middle-Earth.
• The Lord of the Rings:
  • Time Will Tell is this done by a fan of the books. Jorryn from America appears in the Shire, and ends up living with Bilbo and Frodo. When Frodo must leave the Shire, Jorryn goes with him. Time Will Tell brings Jorryn through the Old Forest and to Tom Bombadil, in events from the books but Adapted Out of the movies.
  • Home with the Fairies is a deconstruction. Maddie lands in Middle-earth, but she is lost. When she finds a town, she hits a Language Barrier because no one speaks English or knows anything about America, her home. She almost dies, and lampshades the Plot Armor that seems to keep her alive. Unlike most of these characters, Maddie also wants to find a way home.
  • The Game of the Gods features a few Sues who try this, if they're not natives already. This can provide a very quick end to their storyline; jumping into a TV screen showing the LOTR movies won't realistically send you to another world, but it can electrocute you.
• A Loud Among Demons zigzags this; Lincoln Loud has his soul bound to Hell after an attempted sacrifice by an Evil Teacher gets thwarted by the Immediate Murder Professionals (I.M.P). Technically, Lincoln isn't stuck there as he can return to Earth using Stolas' grimoire whenever he wants. However, the problem lies in the fact that Lincoln cannot permanently leave Hell, as staying on Earth for too long will cause him to be forcibly transported back.
• Manehattan's Lone Guardian kicks off with Fairy Leviathan waking up on a rooftop in Manehattan, Equestria, after getting herself caught in Omega's explosive death throes. She's not happy about being subjected to "one of the oldest cliches in fiction", in her words.
• Mass Foundations has this as a basic plotline for Redemption in the Stars, A New Day, and All the World's a Stage. Something had caused the protagonist(s) to be transported to another universe and they have to adapt and maybe find a way back. Though in All the World's a Stage, the Doctor and the Lone Wanderer were able to travel between universes thanks to the TARDIS.
• Metro: Zigzagged Trope. Mads and Thomas are from Another Dimension, specifically, the Shadowrun universe, and effectively also have You Can't Go Home Again, as while they can, they wouldn't be given a warm welcome if they made it.
• The My Little Pony: Friendship Is Magic fans have a whole slew of these, referred to as "Human In Equestria" fics.
  • My Little Wesker, in which the spectacularly evil Big Bad of the Resident Evil games becomes trapped in Equestria. He does not approve.
  • Shackles and Friendship has the protagonist, Rodney, become a minor Eldritch Abomination due to his weird reaction to magic — he can store limitless ammounts of it.
  • The Non Brony Verse has our protagonist summoned to Equestria when Celestia sees him get hit by a car. Like Wesker, he also disaproves.
  • The Rise of Darth Vulcan has the protagonist make THE Alicorn Amulet part of his Evil Overlord halloween costume, and gets teleported there when he vows its destruction.
  • The Displaced Verse, wherein a mysterious Merchant sells cosplayers a trinket that gets them sucked into Equestria at the earliest opportunity, as whoever they were cosplaying as at the time. They inevitablelly upset the natives somehow and become a Villain Protagonist.
• In New Stars (a crossover between The Orville and Star Wars: The Clone Wars) a clone soldier named CT-5599 (or Maxx) ends up in the same universe as the Union ship Orville with no guaranteed way of getting back to the Republic.
• New Vegas Showtime involves the Phantom Thieves of Hearts being randomly scattered across the Mojave Wasteland.
• Outsiders: After her repeated attempts to summon a familiar from his world draw the attention and ire of Arceus, Louise requests a chance to prove herself worthy. Arceus give her one year on Earth to do so. Later her friend Henrietta tells Mew that she misses Louise. Hearing this, Mew drags her along to Earth and ditches her in the middle of Lumiose city.
• Peter Parker Needs A Hug: After everything that happened to him in No Way Home, Peter Parker found himself accidentally transported to a different city in a new reality. Specifically, he landed in Gotham, leading to Spider-Man being the newest rogue on the Bats' radar.
• The Pieces Lie Where They Fell: According to his author-given backstory, the omake-exclusive character Reel somehow ended up in an alternate Equestria, just a hair to the side of the canon timeline, where he gained the powers of Kamen Rider Skull and then some (the author swears this is not a Displaced fic, since no conventions were involved and he didn't find his equipment until after he and it arrived there separately). While not strictly trapped there anymore after an encounter with Kamen Riders Decade and Double (which led to his gaining Decade's ability to travel around dimensions), he now calls it home and always returns between visits to other worlds.
• Point Me at the Skyrim's plot starts off with the superhero Antares waking up on the cart to Helgen for execution. Suffice to say she does not take being held against her will in a fantasy world, with no idea how she had arrived there, well at all.
• The Portal: Thomas Smith and his family wind up being pulled into the Dragon Realms, and it's heavily implied that they may be unable to return to their world.
• Remnant of a Worm: After Contessa shot Taylor in the head to remove her Khepri powers, Glatig Uaine opened a portal to Remnant and left Taylor there to give her a second chance.
• Rosario Vampire: Brightest Darkness Act VI: In response to the breakdown of the peace treaty and the HDA declaring war on the monster world, the Dark Lords close off the gateways to the monster world to prevent them from attacking, trapping Moka and co. in the human world and forcing them into hiding.
• Ruby Pair: The plot of "Gaols & Ghouls" is that Dib, Gaz, Zim, Tenn, and GIR are sucked into the titular game and have to complete a quest campaign in order to return to the real world.
• Slipping Between Worlds, in which through the agency of the mysterious Mrs. Tachyon and her old-bag-lady shopping trolley - which is not what it seems - a group of British soldiers evade death on Roundworld only to end up in Ankh-Morpork on the Discworld.
• In Son of Sparda D×D, Dante winds up in the D×D world aged down to 16 after his battle with Argosax the Chaos. He's not too concerned with getting back to his world and is mostly just trying to live life and pay his bills. This also applies to Vergil and Modeus, both of whom have been there much longer than Dante has.
• The Spectacular Spider-Man: Lost in Gotham: After a lab accident, Spectacular's Spider-Man sacrifices himself to save Gwen Stacy, allowing himself to be sucked into what turns out to be a portal. Said portal sends him to Gotham, with no way home.
• In Spider-Man and Oola, Spider-Man is transported to the world of Star Wars along with Doctor Doom, and saves Oola the Twi'lek from the Rancor. As of the most recently published chapter, Captain America, Tigra and the Human Torch have joined him.
• Star Trek: Phoenix: The core premise of the story is that the magical mirror that, in canon, leads to the My Little Pony: Equestria Girls universe instead transports Sunset and later Twilight to the Earth of Star Trek. Unlike its canonical version, the mirror doesn't have a corresponding portal on the other end — it simply opens a hole in reality, tosses them out, and closes behind them, leaving them stranded in an alien world with no way to return home. Finding a way to track down their homeworld and return to Equestria is Sunset and Twilight's primary motivation in the story.
• Superman and Man: Christopher Reeve finds himself trapped in a world where he is Superman while the Man of Steel himself finds himself stuck in a world where he's a comic-book character, occupying a disabled person's body.
• In Tales of Hetalia, the Allies and the Axis are sucked into the world of Rukassia by a magic book.
• Tattered Capes Under a Shattered Moon: Dragon and Defiant crash down on Remnant, and the portal that brought them there is too damaged for them to repair it.
• Temporal Anomaly: After being Ret-Gone from his world's history thanks to the actions of his younger self, Sougo finds himself in the world of Drakengard, during the time when the Intoners still roamed the world.
• Time Break Saga: At the start of, Lambda winds up in the Kingdom Hearts world with no way back to her reality. This is overall treated as a good thing given how horrible Relius' experiments were on her and how she makes it clear that she doesn't want to return to her world.
• That time a bomb in Moonbase teleported us to a fantasy world is Exactly What It Says on the Tin-a bomb exploding on the Kids Next Door moonbase sends Sector V, Numbuh 362, Numbuh 86, Numbuh 60, Numbuh 23, Numbuh 35, Numbuh 83, Numbuh 84 and the Delightful Children to a fantasy world based around Granblue Fantasy. Unlike most stories of this nature, this is revealed to have been an intentional plan by the king of the world they land in, as there was a story about twelve heroes defeating a creature of legend and when no hero could be found in his world, the king opted to search other universes, with the Kids Next Door operatives being the best option he could find to fill the role.
• They're Not Pussywillow Pixies: This is what happens to Azrael, Gargamel, and the Smurfs when they go through a portal and end up in Neverland.
• Ultrasonic involves Marinette somehow ending up in Zootopia, in the body of a white cat.
• The Underside of Gotham strands the Undersiders in Gotham, where they come into conflict with its protectors.
• With Strings Attached: The Beatles are scooped up and dropped on the planet C'hou with nothing except the clothes on their backs and some musical instruments; they're terrified out of their minds and have absolutely no idea why they're there. The reader knows they're there as the subjects of an alien undergraduate psychology experiment (at least initially, until the experiment breaks down), but the four don't learn anything for around a month, when they're told that they've been brought over and equipped to fetch the three pieces of a statue to end a continent-sized curse. The quest is legitimate in context, but was assigned to them after they were equipped.
• What Insertion? starts with Inuyasha and a real-world collegian being transferred from their respective worlds into the mind of Hellmaster Phibrizzo, then getting him permanently stuck in a more modern setting.

---