The rivalry between them. Conan is a detective and Kaito Kid is a thief. Their constant cat - and - mouse game makes for exciting stories. Each is trying to outwit the other.
Well, it's also about the mystery aspect. Kaito Kid's heists are always full of puzzles and Conan is always there to try and solve them. Their different personalities also add to the charm. Conan is serious and logical while Kaito Kid is more flamboyant and confident. In fanfics, these traits are often explored in new and interesting ways, like having them team up in unexpected situations which creates a whole new dynamic.
Sure. 'The Encounter in the Moonlight' is a great one. It has an interesting plot where Conan and Kaito Kid cross paths in a mysterious situation on a moonlit night. Their interactions are full of tension and mystery, just like in the original series.
Rivalry is a very common theme. Kaito Kid and Shinichi are both highly intelligent characters, so their battles of wits are often central to the stories. For example, in many fics, Kaito Kid will plan a heist and Shinichi will try to stop him, creating a tense and exciting dynamic.
I really like the interactions where Kaito Kid teases Conan. It's so much fun to see how Conan gets all flustered but still tries to be in control. For example, when Kaito Kid leaves behind little clues just to mess with Conan's detective skills. Another great interaction is when they actually have to rely on each other in a dangerous situation, like when they are trapped in an old building together.
One great plot idea could be a team - up. Kaito Kid gets framed for a crime he didn't commit, and Conan has to help him clear his name while also trying to catch him in his thieving acts. Another could be a time - travel plot where they both end up in the past and have to work together to get back to their own time. Maybe they discover a common enemy from the past that is causing problems in the present as well.
The potential for a forbidden love story. Kaito's identity as a thief and Aoko's connection to the law enforcement side in a way add to the allure. It gives fanfiction writers a great canvas to paint a story of love that defies the odds and expectations.
One great piece of fanfiction could be 'The Heist and the Detective's Dilemma'. In this fic, Kaito Kid's elaborate heists start to involve Shinichi in unexpected ways, leading to a thrilling cat - and - mouse chase filled with mystery and some great character interactions.
Well, the contrast between their characters is a big factor. Kaito is a flamboyant thief and Shinichi is a brilliant detective. This 'opposites attract' dynamic creates a lot of interesting scenarios and tension.
One plot idea could be that Kaito Kid steals a precious jewel that has some hidden secret related to Shinichi's past case. Conan, while trying to solve the mystery of the jewel, has to team up with Kaito Kid who has his own reasons for stealing it. Another idea is that Shinichi, in his Conan form, is invited to a magic show by Kaito Kid where Kaito Kid uses the show to set up a mystery that only Shinichi can solve. And a third idea could be that a new villain emerges who targets all three of them, forcing Kaito Kid, Shinichi (as Conan), and the Detective Conan gang to work together to defeat the villain.
The main thing that makes 'Death the Kid x Blackstar fanfic' interesting is the contrast between the two characters. Death the Kid is all about symmetry and order, while Blackstar is chaotic and full of energy. Their interactions can be really dynamic and unpredictable.
The popularity of Detective Conan x Ran fanfictions lies in the strong existing relationship between the two characters in the original series. Fans are always curious about how their relationship could develop further, like if Ran will finally figure out Conan's true identity. Also, the mystery and adventure elements in the original show can be carried over into the fanfictions in unique ways.