One great 'killua crossover fanfic' is 'Killua in the World of Naruto'. It combines the unique abilities of Killua from 'Hunter x Hunter' with the ninja world of Naruto. Another is 'Killua Meets the Avengers', which creates an interesting scenario where Killua interacts with the superheroes. There's also 'Killua's Adventure in Middle - earth' that blends the character into the Lord of the Rings universe.
To start your 'killua crossover fanfic', you need to know Killua's character really well. Think about his motives, his strengths and weaknesses. Then, choose the crossover world. Let's say it's the Star Wars universe. Consider how he would fit into the Jedi - Sith dynamic. After that, create some conflict. For instance, Killua might be mistaken for a Sith apprentice and have to prove his innocence. Write down your ideas as an outline first and then start fleshing out the story.
One common theme is power - up. When Killua crosses over into another universe, he often gains new abilities or finds ways to enhance his existing ones. For example, in a crossover with a superhero universe, he might learn to control a new type of energy. Another theme is friendship. He forms new bonds with characters from the other universe.
As I mentioned before, 'lemon' implies adult content which is not suitable for discussion. So, I can't really talk about the characteristics of such fanfics.
One popular 'killua crossover fanfiction' is 'Killua in the World of Naruto'. It's really interesting to see how Killua's skills and personality interact with the Naruto universe. Another one could be 'Killua and the Wizarding World' which blends the Hunter x Hunter world with Harry Potter. It has some unique plot twists.
The appeal of 'Killua Zoldyck crossover fanfiction' lies in the fact that it combines Killua's unique character with different universes. His assassin skills and complex personality can create new and exciting storylines when put into other worlds.
Killua could potentially adapt his Nen abilities to the magic system in Fairy Tail. His Lightning Palm, for example, could be seen as a form of lightning - based magic in the Fairy Tail world. He might be able to combine his assassin skills with the magic knowledge of Fairy Tail. Maybe he'd learn some new spells or techniques from the wizards there to enhance his own fighting style.
One great example could be a story where Killua joins the Fairy Tail guild. He'd bring his assassin skills and unique Nen abilities to the guild. His friendship with Gon could also be incorporated, like Gon visiting the Fairy Tail world and the two getting into adventures together with the Fairy Tail members. It's interesting to see how Killua would interact with characters like Natsu, who is hot - headed but has a good heart, or Lucy, with her celestial spirit magic.
One great 'Killua Zoldyck crossover fanfiction' is 'Killua in Another World'. In this story, Killua gets transported to a different anime universe. It's really exciting as he has to adapt to new powers and enemies. The author does a great job of maintaining Killua's character while exploring new scenarios.
I'm not sure specifically about a fanfic with that exact title. There are a lot of 'Killua x Gon' fanfics out there in the Hunter x Hunter fandom, but to find one with such a strange title would require some in - depth searching through fanfic platforms.