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.
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.
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.
One idea could be a crossover with 'Alice in Wonderland'. The protagonist of Little Nightmares could fall through a distorted mirror and end up in Wonderland. They would encounter the strange creatures there, but with a Little Nightmares' twist of horror and mystery. For example, the Cheshire Cat could be a more menacing figure, with a dark aura and a creepy smile that reveals sharp teeth.
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.
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.
The 'little nightmares tails fanfiction' might also explore the psychological aspect. The tails could be symbolic of something. For instance, they could represent a sense of otherness or a connection to a more primal part of the characters. In the world of 'Little Nightmares', which is filled with grotesque and disturbing elements, tails could add another layer of mystery. A character might be ashamed of their tail or it could be a source of power that they have to learn to control. Writers could delve deep into these concepts to create engaging fanfiction.
Many 'Little Nightmares 2' Mono fanfictions play with the themes of the game. Mono is a complex character, and fanfiction allows fans to delve into his psyche. Some might explore his feelings of isolation more deeply, or how his connection with Six changes over time. Writers can also introduce new characters or scenarios that interact with Mono, adding new layers to the already rich world of 'Little Nightmares 2'.
Fanfiction about the janitor in Little Nightmares can be really interesting. It often explores the character in more depth. Maybe it delves into his backstory, like how he ended up in that creepy place. Some fanfictions might show a different side of him, perhaps a more sympathetic side that the game doesn't fully reveal.
Well, it could be a story about Seven and Six's adventure in the dark and strange world of Little Nightmares. Maybe they team up to face a new and even more terrifying threat that the original game didn't show. For example, they might discover a hidden part of the Maw where a powerful and evil entity resides, and they have to use their wits and each other's strengths to survive.