Ideas for a Little Nightmares crossover fanfic?

One idea could be a crossover with Hollow Knight. The protagonist of Little Nightmares could find themselves in the Hallownest, facing the strange and often menacing bugs there. The dark and eerie atmosphere of both worlds would blend well.

First, decide on the two universes you want to cross over. For example, if it's Little Nightmares and 'Silent Hill'. Then, think about how the main character from Little Nightmares would end up in the Silent Hill world. Maybe they get lost in a strange fog and suddenly find themselves there. Next, introduce the elements of Silent Hill, like the rusty and desolate environment, and start building the conflict. Will the character be hunted by the creatures from both universes? That's how you can start.

A cool plot could be a character swap. Imagine Frisk from Undertale in the world of Little Nightmares. Frisk's determination would be put to the test in the nightmarish setting of Little Nightmares. They would have to face the Janitor and the Twin Chefs just like Six does. Meanwhile, Six could be in the Underground, dealing with Flowey and Toriel. The contrast in the two worlds' aesthetics and challenges would make for an exciting story.

A more heart - warming fanfiction could be a story where the characters get a moment of peace. Imagine if there was a hidden corner in the world of Little Nightmares where the characters could relax. Six could share her food with the others, and they could all have a brief moment of camaraderie, forgetting the horrors that surround them for a while.

Well, you could write a fanfiction where the stomach growl of the character attracts the attention of a friendly but strange creature. This creature could help the character find food in exchange for something. For example, the character might have to solve a riddle for the creature.

First, decide which two universes you want to cross over. For example, if it's Little Nightmares and Alice: Madness Returns, study the lore and characters of both. Then, create a scenario that brings the characters together, like a strange portal opening up.

An OC could be a former cook in the Maw who has a change of heart. The fanfiction could explore their journey of redemption as they help the other children. They might have knowledge of the Maw's layout and use it to their advantage.

One idea could be exploring the backstory of the Thin Man. Maybe he was once a normal child in the world of Little Nightmares but something happened to turn him into that terrifying figure.

The color palette of both can be combined. Little Nightmares has a lot of dark, muted tones, while Undertale has more bright and distinct colors in some areas. In the crossover, you could have the dreary halls of the Maw tinted with a bit of the purple glow from the Underground. For the characters, Six's ragged clothes could be contrasted with Frisk's bright blue and purple striped shirt. You can also blend the spooky nature of Little Nightmares with the somewhat comical but also menacing aspects of Undertale, like making the Janitor have some of Sans' laid - back but dangerous attitude.

Well, some fanfics might explore the concept of the world beyond what we see in the game. Maybe there are hidden levels or areas that the characters discover. It could also be about the relationships between the different creepy creatures in more depth. Like, how they interact when not chasing the main character, and what their society or hierarchy is like.