The plot could revolve around a missing person who has a connection to both the world of Warehouse 13 and Bones. Maybe the missing person was researching an artifact for Warehouse 13 and also had some sort of relationship with a case that Bones was working on. The two teams would then have to combine their resources. The Warehouse 13 agents could look into any possible artifact - related reasons for the disappearance, like if the person was targeted because they knew too much about a dangerous item. The Bones team could search for any physical evidence at the person's last known locations.
Pete from Warehouse 13 and Brennan from Bones could have an interesting interaction. Pete is more of a street - smart, intuitive agent, while Brennan is extremely logical and scientific. Their different ways of thinking could lead to some humorous and also thought - provoking exchanges. For example, Pete might make a quick assumption based on his gut feeling, and Brennan would question him with her scientific knowledge, but in the end, they might find that both their approaches are useful in solving the problem at hand.
Character interaction is key. For example, when Warehouse 13 crosses over with another show, seeing how the Warehouse agents like Pete and Myka get along with characters from the other universe. It could be a clash of personalities or a really great partnership.
One possible plot could be that Brennan is kidnapped by a serial killer who has an obsession with her work in forensics. The rest of the team at the Jeffersonian would then have to use their skills to find her before it's too late. Maybe the kidnapper is leaving clues related to old cases Brennan worked on.
One idea could be that Buffy and the Bones team have to work together to solve a mystery involving a supernatural entity that leaves behind skeletal remains with strange markings. The Bones team's scientific expertise and Buffy's knowledge of the supernatural would create an interesting dynamic.
First, look for how the two universes' technologies interact. In Eureka, there's all that advanced scientific tech, and Warehouse 13 has its own unique artifacts. Seeing how they blend or clash is exciting. Also, the characters' reactions to the crossover situation are important. For example, how would a Warehouse agent react to Eureka's wacky inventions?
Definitely Naruto would be a main character. He is the protagonist of the original series and would be the one to drive the story forward in the crossover. Then, perhaps a new character could be introduced who has a special connection to the bone - related aspect. This character could be from another world or a long - lost clan in the Naruto universe. Also, Gaara could be a main character. His sand powers could interact in interesting ways with the bone - related elements, like his sand protecting him from bone attacks or being able to incorporate bones into his sand defenses.
One great Warehouse 13 crossover fanfic could be a crossover with 'Supernatural'. It might involve the Warehouse agents dealing with the supernatural entities that the Winchester brothers usually hunt. Another could be a crossover with 'Doctor Who', where the Doctor visits the Warehouse and all kinds of time - space and artifact related chaos ensues. There could also be a crossover with 'Buffy the Vampire Slayer', with the Warehouse artifacts affecting the vampires and demons in Sunnydale.
Maybe there's a case where the Bones team discovers a body that has a connection to an old family in Sleepy Hollow. The family has a long - held secret that involves a pact with a dark force. Crane and the Bones team must work together to uncover the truth. The team might initially be skeptical of Crane's tales of the supernatural, but as they dig deeper, they start to realize that there might be more to it. Brennan could analyze the bones in ways Crane never thought possible, while Crane could provide historical and supernatural context that helps the team understand the bigger picture.
One possibility is that they meet during a Ministry event. Harry is there because of his status as the 'Boy Who Lived' and Amelia Bones is representing the Department of Magical Law Enforcement. They strike up a conversation about the future of the wizarding world and how to better protect it from the remnants of Voldemort's followers.
The plot might involve the girl being in a dangerous situation because of the goop. Bones could use her scientific knowledge to analyze it. Booth, on the other hand, would be more focused on protecting the girl and finding the culprit. It could also explore how the three characters interact in this strange situation, perhaps leading to some new revelations about their characters.