Some Re:Zero fanfic ideas, crossover mostly

miscellaneous crack ideas 4

Crack 001: Whenever someone's name is eaten after Subaru comes in, their spot is filled by Subaru in everyone's memories similar to Crush If and Nameless Princess, but for everyone. Unlike the mentioned fics, this includes multiple contractionary things at the same times, like when Rem is eaten after the Whale, everyone would remember Subaru riding Patrasche next to Subaru as one of them shoots ice, while Subaru is somehow in the crowd of random soldiers multiple times, documents change to match this, gender and race isn't corrected in memories. Could add physical evidence to these things happening onto Subaru like how he has the emblem in the previously mentioned fics or not. Start points could be Rem is erased by the Whale in that failed loop or right after Rem is eaten in the first post-whale loop, deciding that it's like normal for the whale erasing people if the latter.

Crack 010: Anytime someone's name is eaten, they are remembered as an undefined them, including if multiple undefined thems are doing multiple different things at the same time. Actions can be remembered, but not any personal traits.

011: First checkpoint is a little before Subaru's summoning, whether that be when he wakes up for the day or a week before summoning. Either way, the summoning timing stays the same each loop. Could have the book slightly adjust the situation he's summoned into each loop if the week option.

Crack 100: Failed loops have a new Subaru spawn in the capital 24 hours after current Subaru dies, they have RBD and also spawn new ones upon death.

Crack 101: Give Subaru your inventory in whatever game you most recently played upon his summoning.(For me personally, it would be 30 Energy Drinks, 30 small handheld cannons that continuously shoot when being held, 30 of an item that is useless to him, 13 Tomatoes that heal fully upon eating, 12 of a bomb that expands when being held until it's thrown, and a lot of masks, items only active upon being taken out of inventory)

Crack 110: Give Subaru a watch for exact loop timing, one that can be winded manually and he knows how to repair if damaged a bit.

Crack 111: Subaru is wearing an outfit that has glow in the dark stripes that follow his limbs and wearing shoes that have LEDs that light up when walking upon getting summoned, very new on both of those for maximum lifespan. He can also has one of those flashlights so bright that they light up a large part of a neighborhood upon turning on with or without the previous stuff. 

Some Arc 6 spoilers on the first Crack 1 after this:

Crack 1: Instead of bringing Reid in, the 2nd trial summons the Aeon Hero Galacta Knight. Other than if Galacta Knight decides to trash the tower then leave the planet, I have no idea how the crew would be able to survive them. Alternatively, could have The Wizard from Another World, Parallel Nightmare appear and cause problems at some point.

Crack 2: The Forbidden library makes a copy of any book that enters it for this and Subaru has a flash drive with the Library of Babel on it. The library executes the code and starts making an infinite amount of mostly nonsense books. Alternatively, could do this with a drive including the entire Wikipedia or something.

Crack 3: Subaru is summoned with the book containing the largest known prime number. I guess he can give it to Echidna or something.

Crack 4: E-123 Omega appears and starts hunting Omega shortly after she chooses that name.

Crack 5: Once a new checkpoint is set, everyone other than Subaru can only remember failed loops for that time period, Subaru stays the same(if no failed loops between the most recent checkpoint and the new checkpoint, nothing happens, people can't tell the order that loops took place in and could only kinda tell if they have a lot of interaction with Subaru, could add this to Al too?).