Well, without having read it, it could be a really wild and imaginative piece. Maybe in this fanfiction, 'twilight dream eats the world' is a symbolic way of expressing Twilight's power or a journey she goes on. It could be that her dream has such a far - reaching impact that it's like it's consuming or changing the world around her. It might also involve some sort of alternate universe or strange magic that causes this rather odd concept to occur.
You can try looking on popular fanfiction websites like FanFiction.net or Archive of Our Own (AO3). These platforms usually have a large collection of MLP fanfictions, so there's a chance you'll find it there.
The plot might involve Twilight being cursed or tricked into this 'eats the everything' state. She might start by accidentally consuming small things like flowers or books, which gradually grow into bigger things. And as she eats more, it affects the balance of the world around her, causing her friends to worry and try to find a way to reverse it.
The Princesses, Celestia and Luna, are likely to be part of it. They might be the ones with the knowledge or power to help Twilight. Celestia could offer her wisdom on how to control this new and dangerous ability, while Luna might use her connection to the night and dreams to figure out if Twilight is under some sort of spell.
Fanfiction often takes creative liberties. In the case of 'mlp twilight baby fanfiction', it may involve Twilight being reimagined as a baby. This could lead to all sorts of interesting plotlines. It might include things like how she discovers the world around her for the first time. It could also involve her being in situations that are both humorous and heart - warming, such as trying to communicate with her friends in a baby - like way or getting into innocent little misadventures.
Well, it could be about a whole bunch of things. It might be a story that focuses on the relationship between Twilight and the author or a self - inserted character. Maybe it's an adventure they go on together in the My Little Pony universe. It could also explore their friendship, or perhaps a magical quest where Twilight's knowledge and skills are combined with the experiences of the other character.
In 'dark twilight mlp fanfiction', it might also be a story that delves into Twilight's inner demons. For example, her insecurities about being a princess or her fear of not being able to protect her friends could be magnified. The story could show how she overcomes or succumbs to these internal struggles in a much darker setting than the normal My Little Pony stories.
I'm not really sure specifically as it involves very dark and disturbing themes. Fanfiction can vary greatly in content, but any form of promoting or glorifying suicide is unacceptable. My advice would be to stay away from such content as it can be harmful to mental health.
Since it's an abandoned fanfiction about Twilight in MLP, it might have been about her journey into a dark or difficult part of her life. Maybe she was abandoned in a magical realm or by her mentor, and the story was supposed to explore how she coped with that. However, as it's abandoned, we can only guess at the full plot. It could also have been about Twilight feeling abandoned by her studies or her purpose in Ponyville, and the story was to show her finding a new way forward.
The 'twilight has a tattoo mlp fanfiction' might be centered around Twilight's character development through the acquisition of a tattoo. It could be a way to show her breaking out of her normal, studious shell. Perhaps she gets the tattoo on a whim during a journey, and then has to deal with the consequences. This could include facing the judgment of the more traditional ponies in Canterlot, or learning to love this new part of herself. It could also tie into existing MLP lore, like if the tattoo has some connection to an ancient magic or prophecy.
A fanfiction might revolve around Dusk Shine and Twilight Sparkle accidentally swapping magic. This would lead to all sorts of comical situations as they try to figure out how to reverse the spell. Along the way, they would learn more about each other's magic and the unique ways they use it. It could also be a chance for them to strengthen their bond as they rely on one another to get through this strange situation.