One possible plot could be that Mabel and Dipper get trapped in a strange game world created by Bill. Bill, being his mischievous self, tries to manipulate the rules of the game to turn Mabel and Dipper against each other. But their strong bond of love for each other as siblings helps them see through Bill's tricks and they start to find ways to turn the tables on him within the game. Maybe they use the power of love, which is something Bill doesn't understand, to break free from the game world and defeat Bill once and for all.
Perhaps in the fanfic, Mabel, Dipper and Bill are all forced to play a love - themed game. Bill, who has his own devious plans, tries to use the game to steal the love that Mabel and Dipper have for their friends and family. However, Mabel and Dipper are not so easily swayed. They use their wits and the genuine love they have for each other to outsmart Bill at every turn in the game. They might even find a way to make Bill experience love in a positive way, which changes his nature in the end.
The plot could be that there is a magical game which is centered around love. Mabel and Dipper accidentally enter this game, not knowing that Bill is also there, lurking in the shadows. Bill wants to corrupt the concept of love within the game. Mabel, being the more optimistic and loving one, starts to spread love among the game characters. Dipper, on the other hand, tries to figure out the mechanics of the game to stop Bill. Their combined efforts of love and intelligence could lead to a victory over Bill in this strange game - based fanfic world.
A possible plot could be that an evil entity traps Mabel, Dipper and Bil in a love game. The rules are strange and they have to find true love within the game world to escape. Mabel might start by trying to set up Dipper with a character in the game, but then realizes she has feelings for him herself. Meanwhile, Bil is trying to figure out the true nature of the game and stumbles upon some secrets that could help them all.
In such a fanfic, Bill Cipher might try to trick Dipper and Mabel. He could offer them false knowledge or tempt them with strange powers. Maybe Dipper would be the first to suspect Bill's motives, while Mabel might be more easily swayed by his charm at first.
Mabel would likely be developed as the heart of the story. Her natural inclination towards love and friendship would be amplified. She might be the one who first reaches out to the other characters in the game, trying to spread love and positive emotions. Dipper, on the other hand, would be more of the strategist. He would use his intelligence to understand the game's rules related to love, like how love can be a power - up or a weakness. Bill would start as the antagonist, trying to disrupt the love in the game. But as the story progresses, he could be slowly influenced by Mabel's love, leading to a change in his character.
In this love game fanfic, it could start with Mabel, Dipper and Bil being transported into a magical world that is all about love. There could be different levels in the game. At the first level, they have to figure out each other's love languages. Mabel might be all about gift - giving, Dipper could value quality time, and Bil might be into acts of service. As they progress, they face challenges that test their relationships and they learn more about themselves and each other in the process.
One common theme is friendship. Even though it's a love game, their strong bond as siblings and friends is often explored. Another theme is mystery, as the nature of the love game itself is usually a mystery they have to solve.
One possible plot is that they are recruited into a secret Suicide Squad - esque team to stop an impending apocalypse. Bill could see it as an opportunity for his own gain, while Dipper is more focused on saving the world. Along the way, they encounter strange creatures and difficult moral choices. Their interactions with the other members of the squad, if there are any, would also add to the complexity of the story.
Perhaps Bill, who has changed his ways a bit, tries to court Dipper in his own unique way. He shows Dipper different dimensions and secrets of the universe that only he can access. Dipper is initially hesitant but is drawn to Bill's charm and the mystery he represents. As they get to know each other more, they find that they complement each other well, and getting married seems like the natural next step for them. Their relationship could be a symbol of two different worlds coming together.
Well, one popular 'Mabel Dipper Love Game Fanfic' is 'The Twin's Adventure in Love Game'. It has an interesting plot where Mabel and Dipper get involved in a mysterious love - themed game and they have to face various challenges together. It's really engaging.
One possibility could be that they find a magical baby in Gravity Falls. Dipper would be very cautious and want to research about its origin while Mabel would be all excited and want to play with the baby right away. They might take on the roles of surrogate parents, facing challenges like protecting the baby from the strange creatures in the forest.
One possible plot could be that Bill takes Mabel to his dimension. There, Mabel has to use her wits and creativity to outsmart Bill. Maybe she befriends some of the strange creatures in Bill's realm who help her in her escape plan.