Can you recommend some good Conan crossover fanfiction?

Well, 'Conan's Forbidden Romance' is a conan lemon fanfiction that stands out. It has a complex story line that involves Conan in a relationship that defies the norm in the Conan universe. There are also some fanfictions that focus on Conan's interactions with certain characters in a romantic and somewhat spicy way, like 'Conan and the Mysterious Love'.

There's a great fanfiction called 'Conan and Haibara: Parallel Paths'. In this story, the two of them are on different investigations that end up being related in unexpected ways. It shows their intelligence and deductive skills really well. Also, 'Haibara's Hidden Feelings' is quite good as it gives a more in - depth look at Haibara's emotions towards Conan and the other characters.

Well, a good Conan crossover fanfiction often has a seamless integration of the Conan universe with the other crossover universe. For example, if it's a crossover with Harry Potter, the magic elements should blend well with Conan's detective skills. It should not feel forced.

Well, I know a few. 'Haibara and Conan: A Love Beyond Logic' is quite interesting. It shows how their unique situation in the detective world brings them closer. And then there's 'Love in the Shadows of Mystery' where their love story unfolds while they are solving cases together. These fanfictions add a new dimension to their relationship.

One popular 'hitman crossover fanfiction' could be the ones where Hitman crosses over with Assassin's Creed. In these, you often see the two different assassin - like characters interact, with their unique skills and moral compasses clashing or aligning in interesting ways.

There's a 'felicity crossover fanfiction' called 'Felicity Meets the Legends'. In this one, Felicity somehow gets involved with the Legends of Tomorrow crew. It's interesting to see how her character interacts with the time - traveling misfits. Her logical thinking clashes and also blends well with their more chaotic ways.

One interesting arcane crossover fanfiction is 'Arcane Meets Harry Potter'. It creates a really unique scenario where characters from Arcane enter the magical world of Harry Potter. The author does a wonderful job of blending the different magical elements and cultures from both universes. It's full of unexpected twists and turns as the characters from Arcane adapt to the new and strange world of Hogwarts and the wizarding community.

There's also 'Mentalist and Supernatural Crossover'. This fanfic brings in elements from 'Supernatural'. It has the characters from 'The Mentalist' getting involved in a case that has a supernatural twist, which makes for an exciting read as they try to figure out things beyond the normal realm of crime - solving.

One great 'the incredibles crossover fanfiction' is the one where they cross over with the 'Big Hero 6'. It's really interesting to see the Incredibles' superpowers interact with Baymax and the gang's high - tech gadgets.

One place to find valerian crossover fanfiction could be Archive of Our Own (AO3). There are often various fanfics that combine the Valerian universe with other elements. Just search for 'valerian crossover' on the site, and you'll be presented with a list of available works.