Some people say that little nightmares one is an allegory for child abuse, how trauma can turn children into the monsters that made them. How the maw is an orphanage and such as well.

The ending when six betrays mono could be a metaphor for six almost leaving mono. He met her at first around the cabin and then they went to school together. Six gets taken away at the school by the kids which could resemble her making new friends and ditching mono. In the hospital, mono also does a lot of the tasks on his own, this could suggest that six was rarely there for mono when he was in hospital with his parent. At the end six lets mono fall and this could be her moving on (to the maw) and leaving mono behind, constantly remembering his life events like a nightmare

Some little facts about the world of Little Nightmares 2:

*There are 249 patients within the Pale City hospital.

*There is a metal band titled “Death Burger”

*There are two male bullies named Truls and Benny, and then there is a female bully name Jennifor.

*The children featured in the Little Nightmares 2 comics have in-game models and animations that were intended to make an appearance within the campaign. They can bee seen through the game files.

*The taxidermy dad seen within the Hunter’s cabin was intended to fall out of his seat and onto the floor to startle the player while in the dinning room.

*The ending sequence with Mono’s transformation was originally going to be much longer. I believe it was showing that Mono was physically tied to his chair and is struggling to break free. As he ages, the struggling is less frequent, and then he stops.

*We were originally going to see a teenage Mono.

*There is a child with a ghost sheet whose nicknamed “Spirit.” He is not the same child featured in the Little Nightmares 2 comics.

*The eye entity seen chasing Mono and Six through the crumbling Black Tower is called “Flesh Walls.”

*We were originally going to have an enemy that essentially acted the same way the stone-turning eyes did in the Maw, though this time it is an actual eye looking through a television.

Mono is a character that is afraid of being alone.
Mono-phobia is the fear of being alone.
COINCIDENCE I THINK NOT

This also explains your motive behind destroying Six's music box. When Mono arrives to 'rescue' Six, he finds that she's playing with her music box -unwilling to leave. Unlike the other sentient monsters in the game Six isn't initially hostile towards you, even presenting the music box to you to play with. It's not until you start destroying her toy that she becomes aggressive. When Six was taken away, Mono immediately goes to get her back. However, once he finds her he sees she's happily sitting alone playing with her precious toy like she did at the start of the game. This shocks Mono, who's been alone for most of his life and thought Six would be as anxious to get back to him as he was to get back to her -seeing her as a nightmare for the very first time. Jealous and afraid to be alone, he blames the music box for Six's change and throws a tantrum to destroy the music box. He shouts and taunts her and eventually smashes her music box to pieces. Expecting Six to change back to who she used to be, there's an eerie change to her demeanor when she returns to her childlike form when she stands up to look at you. You're no longer friends. And so, at the end of the game, Six abandons Mono who falls into despair.

*Bonus thought: The eyes surrounding you at the end of the game could be a metaphor for how Mono feels alone and judged or watched by people around him without a friend to be around him. The sudden disappearance of the eyes resembles Mono's detachment from society completely.

I think the devs said that the entire game is based on childrens fears. So yeah this theory is valid.

Theory: eye entity uses children's imagination to twist reality into a nightmare.

what if mono’s dad suffered an accident while hunting where mono shot him in the face (hunter has a hole in his head) but he survived, was in the hospital having to get facial surgery/a prosthetic and ended up dying from his injuries, mono goes to boarding school but gets bullied, and he ends up scared of being alone, sadly blaming himself so he maybe copes with his tv. thin man is locked in a tiny room, no windows, depressed, just sitting there waiting in his own personal lonely nightmare. your theory is one of the best dude

Your ability to connect visual dots would make you SUCH a good art historian. These videos are incredible, I love them so much!

Little nightmares is just : you die a hero or live long enough to become a villain.

god this is sad as hell, especially when you mentioned the thin man being lonely. God, I love a tragic and sympathetic villain

Adding onto this theory I think mono was bullied during his time in school by his classmates because all the school  children are called the bullies and they seems to attack mono everytime he gets near them even though mono has done nothing but just walk by this can also explain why he is really lonely in school also the bullies seem to act like normal kids when the teacher is in front of them but when the teacher is gone they go crazy

Now someone just needs to do a breakdown of how Little Nightmares 1 is a metaphor for Six's life! :D

Maybe the eye symbol is a metaphor for children’s parents. How there’s so controlling and look down at you, and in the end want to make you into something like them

Mono is not turning into Thin man, Mono is turning into his dad : tall (for a child perspective), always dressed for work with a sad face. Thin man is a loop of how he remembered his dad.

Mono’s fate is the saddest thing I’ve seen in years.
Edit: Yes I am Mono, I’m just the one that lived.

I have something that fits into the theory.

We know that Mono is a commentary on loneliness, and you mentioned modern-day Japanese males, The Thin Man being a representation of that. What if Yhe Lady is a commentary on a different side of the coin. We can tell that The Lady hides behind a mask, trying to look beautiful. You can see this is modern-day females, and a lot specifically in Aisa. I think The Lady represents the beauty standard/some kind of idol or celebrity. She is the perfect standard, thin and beautiful, but behind that mask, she can't even keep up with the trends she sets herself.

I really like your theory about this game being in a Japanese City. Another thing that points to that idea is the large amounts of suicides taking place in the game. Japan has one of the largest numbers of suicide each year. Also, chapter of little nightmare with all the fat guest gorging themselves on food really reminded me of the scene from spirited away where Chihiro’s parents are turned into pigs.

Theory: what if the man in the hospital bed is the representation of mono’s father? (I’m talking about the man who was on his death bed, and we had to shut down his life support machine and the doctor rushes etc.

bear traps: danger✅
shotguns: deadly✅
wild animals: yup✅
hotel: trivago✅