One creative storyline could be that the Winchester brothers get stuck in a town haunted by a ghost. The Scooby Doo gang shows up to solve the mystery. Sam and Dean initially think the gang is just a bunch of amateurs, but they soon realize that the gang's skills in unmasking fake ghosts could be useful in their real - life hunting. Another idea is that a demon has possessed one of the Scooby Doo characters, and the Winchesters have to figure out which one and exorcise the demon without scaring the rest of the gang too much. A third could be that there's a cross - dimensional rift that pulls the two groups together to stop an ancient evil that is using both the Supernatural and Scooby Doo universes as its playground.
One plot that stands out is where the Trickster from Supernatural decides to play a game with the Scooby gang. He creates illusions that mix the Scooby Doo villains with Supernatural creatures. The gang has to figure out which are real threats and which are just illusions, all while being chased by some really strange hybrid creatures. It's a plot that combines the mystery - solving aspect of Scooby Doo with the complex and often unpredictable nature of Supernatural.
One common theme is the clash of different worlds. The Scooby Doo gang is used to more 'family - friendly' mysteries, while Supernatural deals with darker and more dangerous supernatural elements. So when they cross over, there's often a theme of the Scooby gang having to adapt to this new level of danger.
One interesting aspect is the character interactions. For example, when Scooby Doo and his gang cross over with characters from other shows, we get to see how their personalities clash or complement each other. It can be really funny to see the cowardly Scooby interact with a very brave character from another series.
One idea could be that the Winchester brothers are hunting a ghost in a town where the Mystery Machine gang also happens to be. The Scooby gang initially mistakes the Winchesters for bad guys but then realizes they're all after the same spooky entity. They could team up, with Sam using his research skills and Dean showing the Scooby gang how to handle real weapons (in a non - dangerous way, of course).
There's also 'Supernatural Scooby Doo: The Case of the Cursed Amulet'. In this one, they discover an ancient amulet that brings all sorts of supernatural trouble. The story does a wonderful job of blending the light - heartedness of Scooby Doo with more serious supernatural themes. It's full of action and mystery.
One great Scooby Doo Supernatural crossover fanfiction is 'The Mystery Inc. and the Winchesters' on FanFiction.net. It has an interesting plot where the Mystery Inc. gang teams up with Sam and Dean to solve a mystery involving a haunted mansion and a powerful supernatural entity.
Cas (Castiel) and Shaggy would be an interesting combination. Cas is an angel who doesn't always understand human behavior, and Shaggy is this skittish but kind - hearted character. Cas might be confused by Shaggy's fear of everything, but also find his simple kindness endearing. Shaggy, on the other hand, might be initially terrified of Cas but then realize he's a friend. It could lead to some really cute and comical interactions in the fanfiction.
One great Supernatural and Scooby Doo fanfiction is 'The Mystery Gang Meets the Winchesters'. It combines the spooky elements of both universes really well. The characters interact in a believable way, with Dean and Sam Winchester teaming up with Scooby and the gang to solve a mystery that involves both ghosts from the Supernatural world and the more typical villains from Scooby Doo. It's a fun read that plays on the strengths of both shows.
Well, Dean Winchester is a hardened hunter. He's seen a lot of dark and terrible things. When he meets the Scooby Doo gang, he might initially think they're in over their heads. But as time goes on, he'd see that they have their own strengths. For example, Velma's sharp mind and ability to analyze clues quickly could be a real asset. Sam, being the more level - headed of the two brothers, would probably be quicker to see the potential in the gang. Shaggy and Scooby's fear of the unknown is different from the Winchesters' fearlessness, but it also adds a touch of humor to the situation. Daphne's beauty and grace combined with her ability to handle herself in tough situations would be appealing to both brothers. Fred's mechanical skills and his ability to set traps could be useful in a hunt. So, while there would be some clashes in personalities, like Dean's cynicism vs. the gang's optimism, there would also be a great deal of blending as they all work towards a common goal.
One popular story could be where the Supernatural characters team up with the Scooby Doo gang to solve a mystery involving a haunted mansion. In this fanfic, Dean might be showing Shaggy how to handle a shotgun while Sam is researching the history of the mansion with Velma.