Well, perhaps in the fanfiction, Harry and Hermione teach the Marauders advanced magic that they themselves have learned in their own time. For example, Hermione could teach Remus some new spells for defense against the dark arts, and Harry could show James some Quidditch techniques that he developed later. They could also try to change the Marauders' view on Snape, trying to prevent some of the animosity that developed between them.
In this fanfiction, it could be that Harry and Hermione are sent back in time on a mission to teach the Marauders about the future threats they unknowingly contributed to. They start by teaching Sirius about the importance of family loyalty in a more profound way, as his actions later had a big impact on Harry's life. Hermione could then teach Peter some self - defense and self - confidence spells, in an attempt to prevent him from turning to the dark side. And Harry could share his experiences of dealing with Voldemort with James, making him more aware of the real danger that was brewing.
The plot might involve Harry and Ginny sharing stories of their battles against Voldemort with the Marauders. In the process of teaching, they could also learn from the Marauders' own pranks and their way of dealing with difficult situations at Hogwarts. This exchange of experiences could lead to new friendships and a better understanding between the two groups.
The Marauders would be the students in this scenario. James would be eager to learn from Harry and also show off his own skills. Sirius would be a bit more rebellious but still interested in what Harry and Hermione have to offer. Remus would be the most studious among them, soaking up all the new knowledge. And Peter would be the one who is a bit more hesitant but still follows along, hoping to improve himself.
One possibility could be that the Marauders plan to prank the Slytherins in a big way. They might use their Animagus forms to sneak into the Slytherin common room and create chaos, like turning all their robes pink or making their beds float. It would be a classic Marauders' style of mischief.
One possible plot could be that the Marauders, in some magical time - travel or alternate reality scenario, get to meet baby Harry. They might be overjoyed to see him and immediately vow to protect him. Sirius could be especially attached, given his future relationship with Harry. They might also play with baby Harry, making him giggle with their magic tricks.
One interesting story could be where the Marauders' era secrets somehow intertwine with Harry and Hermione's adventures in a time - travel plot. For example, they might discover a hidden spell that was created by the Marauders and use it to solve a mystery in their own time.
It's popular because it combines two beloved elements of the Harry Potter universe. Fans love the idea of Harry and Hermione's characters, and adding the mystery and charm of the Marauders era makes it even more appealing.
Well, perhaps in this fanfiction, Harry and Ginny teach at Hogwarts during a time of new threats. They use their unique skills to train students in a more practical way. Ginny, as a Quidditch star, could revolutionize the Quidditch teaching. Harry, on the other hand, might introduce new defensive spells that he learned from his adventures. And they could also have to deal with the politics within Hogwarts, like some teachers being jealous of their popularity among students.
Well, it could be that Harry and Ginny use their own experiences with dark creatures and magic to create really interesting and hands - on lessons. For example, Harry might demonstrate how to fend off a Dementor using a Patronus charm, while Ginny could show how to deal with a Boggart in a practical way.
Perhaps Hermione meets the Marauders when they are in the middle of planning one of their big pranks. They might be suspicious of her at first, thinking she's a spy or something. But then, as they get to know her, they realize she's actually really brilliant. They could end up working together on a new kind of adventure that combines Hermione's intelligence and the Marauders' mischievousness, like solving a mystery in Hogwarts that has been long forgotten.
Well, it changes the plot in many ways. For example, Hermione having a connection to the Marauders means she has access to a whole different set of knowledge and relationships. This could lead to different ways of dealing with Voldemort, like using some of the Marauders' old secrets or contacts.