Perhaps the plot involves a magical artifact that has fallen into the wrong hands in the Supernatural world. Harry, with his knowledge of magic, and the Winchesters, with their experience in dealing with the supernatural, set out to retrieve it. They might face all sorts of challenges along the way, from vampires and werewolves to dark magic spells.
Definitely Harry Potter himself. His magic and his sense of right and wrong would bring a new dynamic to the Winchester world. And then there's Dean Winchester. His tough - guy attitude and his skills as a hunter would be really cool to see interact with Harry. Sam Winchester too, with his intelligence and research skills, could be very interesting when combined with Harry's knowledge of the magical world.
In some fanfictions, Harry Potter might use his magic skills. For example, he could cast protective spells to shield the Winchesters from supernatural threats. His knowledge of the magical world could also help them find solutions to problems they face in their world of hunting monsters.
In some fanfictions, Harry Potter might use his magic skills to help the Winchesters fight against supernatural creatures. For example, his spells could be used to trap demons or protect the Winchesters from dark magic attacks.
In a 'Harry Potter raised by Winchesters' fanfiction, it could be a wild ride. The Winchesters have a complex family dynamic and a lot of emotional baggage. Harry would be exposed to that as he grew up. He might develop a different personality compared to the canon Harry. Instead of the somewhat naive boy at the start of the series, he could be more street - smart and cynical. Also, the magic he uses could be combined with the Winchesters' hunting techniques, creating a whole new set of abilities for him to use against the dark forces.
One possible plot could be that Harry Potter, instead of growing up with the Dursleys, is found by the Winchesters. They would likely train him in hunting skills as well as magic. Harry might use his magic to aid the Winchesters in their battles against demons and other supernatural creatures. And he could also introduce them to the wizarding world, creating a whole new set of adventures and challenges as they try to co - exist in both worlds.
One scenario could be that the Winchesters are trapped in a magical dimension while on a hunt. Harry Potter, with his experience in navigating strange magical places, could find a way to enter the dimension and lead them out. Another possibility is that a powerful dark wizard has set a curse on the Winchesters. Harry, being well - versed in counter - curses, would be able to break it and save them.
Well, perhaps the Winchesters, who are known for hunting supernatural beings in their own universe, find a way into the Harry Potter world. Maybe they sense some dark magic that the wizards in Harry Potter's world can't handle on their own. They then use their skills and knowledge of the supernatural to save Harry from a powerful dark wizard or a dangerous magical creature.
One possible scenario is that Harry Potter uses his magic to heal the Winchesters when they are injured during a hunt. Another could be that he helps them find a hidden object by using magic detection spells.
There could also be other characters from either Stiles' world or the Winchesters' world that make appearances. For example, in Stiles' world, there might be his friends like Scott who could be mentioned or even play a small part in the story. And from the Winchesters' side, characters like Castiel could potentially show up and interact with Stiles in some really interesting ways.