Re:Zero spoliers past Season 3, [A] means that immediately after that, there will be spoliers for the A part of Re:Zero, []means end of spoliers(only used once here), no warnings for Sonic spoliers
Crack 1: Instead of the Sonic X crew being isekai'd to Earth, they are isekai'd to the Re:Zero world with everything that typically goes with them such as the Chaos Emeralds included, everything at once instead of in groups and they all teleport to random locations. If you want to force Shadow in, could also have the ARC follow Subaru because of a link to the Chaos Emeralds and his teleport opened a hole or something, could add Emerl for similar reasons. Unsure what POV to use, but I think the Sonic X crew wouldn't interact with Subaru until at least arc 1 ends.
Crack 2: The portal home for the Sonic characters at the end of season 2 accidentally sent everyone to the Re:Zero world, Chris included when he made his own. Subaru is sent at the same time as Chris.(Unsure if it'd be better to include the time difference thing so both Subaru and Chris are aged down 6 years with the Sonic characters being there for a short time with either an initially aged up Subaru that is then aged down or a very young Subaru, the Sonic characters were there for 6 years and no time difference, or to completely ignore that thing and have the Sonic crew be there for a short time while keeping Chris older) Fun story of what happened on Earth when Subaru meets Al if Al was Isekai'd before the Sonic crew gets there.
Crack 3: The Re:Zero world is just one of the several worlds Sonic & friends visit in Sonic X season 3(there is a random world inhabited by humans in it).
Crack 4: Movie Sonic was sent to the Re:Zero world instead of Earth, Chaos Emeralds also put there.
Crack 5: Instead of being sending him to the Mushroom Planet, Movie Sonic sends Movie Eggman to the world of Re:Zero at the end of the first Sonic Movie.(Or the "Mushroom Planet" is a small part of the world of Re:Zero in this)
Crack 6: Have the Sonic and the Black Knight Knights of the Round Table be completely normally born knights of Lugunica with all their normal powers and swords, the swords being added to the list of enchanted swords.
Idea 7: Have Subaru be the Sonic Forces Avatar, replacing their role of a blank slate pre-summoning(and all the stuff that comes from being a rando from Sonic Earth) and Infinite was also transported at the same time to somewhere, both brought in from the end of Sonic Channel/Otherworld Comedy (2023). Arc 1 would most likely end with him fighting Elsa and at least surviving. Mana could be used as a powersource for Infinite's Phantom Ruby, after a while being able to summon the Sun, which would surpass the Al Shario, but be easier to disrupt. For Subaru's history pre-summoning, could have it be the standard, except with him being some type of anthero(treated as Demihuman for simplicity) and some of the Sonic stuff that affects the whole world such as Sonic Unleashed, and then Eggman's War leads to his home being destroyed and him running away(parents dying is a possibility or they could be captured and put on the death egg, where Subaru saves them) and the rest of the Forces plot, then IDW events(mainly the Zombots), then Sonic Channel/Cover stories (2021)(dealing with global earthquake and Eggman's robots), and lastly, whatever Subaru's desires would would create in Sonic Channel/Otherworld Comedy (2023). Could have it so random shards got embedded in his skin from when the Phantom Ruby prototype broke in his hand and when he and Sonic destroyed 3 in Eggman's base(they hide themselves) and/or him doing lower powered versions of some moves he did with Sonic such as the Homing Attack(without Wire) and/or Boost. Infinite should be able to make Phantom Copies of stuff beyond few that he does in-game, such as anything he should've been able to see directly, such as Dark Gaia's Minions, or stuff that Eggman should have data about, such as any of his robots or the Time Eater, and any Re:Zero stuff he may see/get data for, even pull out some stuff he shouldn't have the data by Reality Altering effects of the Phantom Ruby.
Crack 8: A fic of Infinite being stuck in Null Space post-forces, Al Shamack happening to connect to there, and Infinite dealing with everything that regular Subaru brings there with that spell.
Crack 9: Isekai Tails in the Cyclone. Him just walking around the capital in an advanced-looking "meteor" and destroying Elsa with or without the mech. I'd expect him to learn the written language within a day of the mansion, learn how magic works and make a new actual meteor within a week or 2, and mass produce new meteors(not just Magicreation tools) within a month(Miles Electric being used to analyze mana and existing meteors, probably mass production by massively upgrading Costuul). Just from everyone else's perspective, some outrageously fast and overpowered demihuman fox kid with 2 tails appeared from nowhere and accelerated the tech development by several centuries and then disappeared(made a device to go home).(also, harder for Gluttony to get thanks to nickname) Napalm Bombs for the witch cult.(Note: he has been transported to another world once before in Sonic Rush Adventure) Power Laser could be on par with [Arc 7/8]the Crystal Palace's Magic Crystal Cannon or compared to it.[] Perhaps could have the Cyclone run off a Fake Chaos Emeralds. Note about Tails' House looking like his head.
Idea for Arc 1: Tails appearing and walking around the capital, currency and vocab confusion with appa guy, attempt to intimidate thugs that fails thanks to Tails being a cute kid, then Tails just beating them up and Felt runs by. Emilia comes by and Tails agrees to help Emilia(something about being bullied for having 2 tails). They runs into Plum and Tails lets her ride in the Cyclone while they return her to her parents(while he's running an analysis on Puck) and then they are pointed towards the Loot House. At the Loot House, Tails gets out of the Cyclone and starts to explain it and why he can't sell it after being asked, but pulls out some other device to sell, Elsa attacks, then Tails holds her off until Puck comes out and he gets into the Cyclone and starts shooting down Elsa, and fully defeats her just with some bombardment or a Power Laser. Reinhard comes in to notice Felt's qualification either thanks to him investigating this weird walking metal Meteor that was spotted around the place and/or he noticed the Power Laser. Afterwards, Tails goes with Emilia, either driving the Cyclone in plane mode or car mode.
Idea 10: Instead of Blaze's world, Sonic was sent to the world of Re:Zero at the end of the Metal Virus arc of the Sonic IDW comics with the Chaos Emeralds going through then scattering(Silver optional) and he still has amnesia(can crash land basically anywhere). Instead of Blaze very quickly fixing his amnesia with the Sol Emeralds like in cannon, Sonic has to find the Chaos Emeralds to get his memories back(and/or brief glimpses of them gotten from him getting into situations similar to his memories and from dreams)(He would go by Needlemouse for a bit). Very dangerous Witch Cult if they get a Chaos Emerald. Assuming Sonic's friends take care of that Eggman attack, they would very quickly make a portal to Sonic(probably Tails). Could also have the Sol Emeralds send Blaze to the Re:Zero world, sensing some upcoming disaster, but to the opposite side of the world as Sonic. Some memories out of context, such as the entire Sonic and the Black Knight or the Sonic Superstars true Final Boss could cause some reactions if he mentions remembering either of those.(it's be funny for Reinhard to have a diving protection of title knowledge and just sees all the titles that Sonic has been called through the years(ex. Sonic the Hedgehog, Blue Blur, nasty little pincushion, ultimate lifeform, slayer of kings, Blue Rat, King Arther, Sir Sonic, Knight of the Wind, Blue Buffoon, The Fastest Thing Alive, The Legendary Blue Hedgehog, Speed Demon, Knave the Hedgehog, Little Blue Savior, Blue Wind, Iblis Trigger, faker, horrid little hedgehog, World's Fastest Hedgehog, Sonic Heroes speed type, Mr Monster guy, Warehog, A Guy Who Loves Adventure, Super Sonic, Big Blue, etc.))
Crack 11: Subaru is from Sonic's World and is brought from the metal virus arc, Satella happened to grab him right after he was infected, but not fully turned. He tries to get away from everyone and yells at people to run away, then turns into a Zombot. Zombot apocalypse starts in the capital with all the candidates and knights there.(Unsure if Reinhard could stop it from spreading with it being able to infect plants and the wildlife(Metal Virus Mabeasts just being the worst), but would probably gain a divine protection to protect himself against it. The book would probably have some countermeasures so Rowswaal's plan can still happen and Al probably would ensure Pricilla's safety(wonder if the Yang Sword can burn away the infection like the Chaos Emeralds or it just destroys the zombots)).(Note: Virus somehow transforms worn clothes, so Subaru probably would be somewhat distinct because of his modern clothes, the virus that he's infected with would also be the least mutated version there)
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Some Re:Zero fanfic ideas, crossover mostly
फैनफिक्शनThis was originally a big Sonic X Re:Zero fanfic idea, adding other ideas here that I felt were worth keeping. Ideas originally posted to Reddit by me(will update every so often), spoilers for stuff beyond S2 will be here, but after a warning that c...
