Some fanfiction might focus on an alternate universe where Peter Pettigrew never betrayed the Potters. He could have been a key figure in the fight against Voldemort, using his skills in a positive way. In this type of story, we might see him grow into a brave and loyal wizard, quite different from his canon self.
There are fanfictions that explore Peter Pettigrew's early days at Hogwarts. Maybe he was once a more innocent boy who got influenced by the wrong crowd. For example, a story could show how he first met James, Sirius and Remus and how his insecurities led him down the path of eventually becoming a Death Eater.
Maybe in the fanfiction, Harry catches Peter Pettigrew while he's trying to escape to Voldemort again. Harry uses some new spell he's learned to trap Peter. Then, instead of handing him over to the authorities right away, Harry tries to get information out of him about Voldemort's plans. This could lead to a whole new adventure for Harry and his friends as they try to use the information to prevent Voldemort's next move.
A rather unique fanfiction is 'Harry Potter and Peter Pettigrew: An Unlikely Bond'. This one delves deep into how Harry, after learning about Peter's past and his fear - driven actions, decides to give him a chance. It shows how their relationship develops over time, with Peter slowly trying to make amends for his past deeds and Harry trying to understand the man behind the traitor.
One common theme is redemption. Many fanfictions explore the idea of Peter Pettigrew seeking redemption for his actions. Since he was a traitor to the Potters, some stories show him trying to make up for it, often in relation to Harry.
One unique plotline is when Peter Pettigrew is given the chance to go back in time and change his actions. Another is where he has a secret alliance with a group of wizards who are trying to overthrow Voldemort for different reasons than the Order of the Phoenix. Also, some fanfics have him being a double agent all along, not really loyal to Voldemort but having his own agenda.
In a fanfiction scenario, Peter Pettigrew could be caught by a student who is very observant. This student might notice his strange behavior and start to follow him. Eventually, they catch him in the act of doing something really bad, like trying to hex an innocent student to keep his secrets. This could then lead to a big confrontation where the truth about Peter Pettigrew starts to come out, and the other characters have to deal with the fact that there's a traitor in their midst. It could also involve the student who caught him having to convince others that Peter is not as innocent as he seems, which could be a difficult task considering Peter's ability to act meek and harmless.
One idea could be exploring his childhood before Hogwarts and how wearing diapers was a normal part of that early life. Maybe there were some magical mishaps related to his diaper - like it magically changed colors based on his mood.
Another interesting plot could be a redemption arc for Peter Pettigrew. What if he had a change of heart during the events of the books and tried to make amends? Writers could show how the other characters react to his attempts at redemption, whether they believe him or not. It could also involve him using his skills in a positive way to help defeat Voldemort in the end. This would be a complex and engaging plot as it goes against the typical view of him as a traitor.
Sure. 'Peter Pettigrew: The Untold Story' is an interesting fanfic. It shows Pettigrew in a different light, not just as a simple villain. It details his relationship with the other characters in a more complex way. Then there's 'The Mystery of Peter Pettigrew' which focuses on uncovering secrets about him that were not known in the original books. And 'Peter Pettigrew and the Path to Forgiveness' is about his journey towards redemption, which is quite a unique take on his character.
If Peter Pettigrew was caught, it could have completely changed the course of the story. Maybe Voldemort's plans would have been foiled earlier.
One great 'Peter Pettigrew Marauders' fanfiction is 'The Lost Marauder'. It delves into Peter's complex relationship with the other Marauders in a really interesting way.