One interesting plot could be that Yusuke from Yu Yu Hakusho gets transported to the world of Inuyasha. He teams up with Inuyasha and his group to fight a common enemy, like a powerful demon that is causing chaos in both their worlds. Yusuke's spirit energy could be a great asset in battles against the demons in Inuyasha's world.
Yusuke's Rei - gun from Yu Yu Hakusho could be combined with Inuyasha's Tessaiga. For example, Yusuke could use his Rei - gun to enhance the power of Inuyasha's Tessaiga slashes. This would create a more powerful attack against demons. The combination of their raw power would be a force to be reckoned with.
Well, perhaps the Sacred Jewel from Inuyasha somehow gets linked to the Spirit World in Yu Yu Hakusho. Kagome and Inuyasha follow the strange energy trail to the Spirit World. There, they meet Yusuke and Kuwabara. They find out that a powerful spirit in the Yu Yu Hakusho world is corrupted by the dark energy of the Sacred Jewel fragments. So they all have to work together to purify the spirit and restore balance to both worlds. The differences in their fighting styles, like Inuyasha's swordsmanship and Yusuke's martial arts - based spirit attacks, would make for some cool battle scenes.
I think Kurama and Kagome would be an interesting pair. Kurama, with his calm and intelligent demeanor, and his ability to use plants and nature - based powers in combat, could learn a lot from Kagome's knowledge of spiritual powers and the Sacred Jewel. Kagome, on the other hand, could be intrigued by Kurama's complex past as a demon - turned - good. They could exchange ideas about how to deal with demons and use their respective powers more effectively. And their more gentle personalities compared to some of the other characters in their respective shows could lead to some really interesting character - development - focused interactions.
Another theme is friendship. Yusuke often forms new friendships or has his ideas about friendship challenged. In crossovers with the Harry Potter world, he might not understand the concept of houses and loyalty at first, but through his adventures, he learns about different types of friendship.
Archive of Our Own (AO3) is also a great place to find such fanfiction. There are many well - written and creative 'yu yu hakusho crossover' stories there. The tagging system on AO3 makes it easier to filter and find the specific crossovers you're interested in.
One common theme is power exploration. Since Hiei is a powerful character, fanfictions often explore how his powers interact with new elements in the crossover. For example, in crossovers with other supernatural worlds, how his demon powers compare or combine.
One great 'yu yu hakusho crossover fanfiction' is the one where Yu Yu Hakusho characters cross over with Naruto characters. It's really interesting to see how the different power systems interact. For example, Yusuke's spirit gun against Naruto's Rasengan.
The main difference is the gaming element. In 'yu yu hakusho gamer fanfiction', there are often references to game mechanics like leveling up, stats, and skills. Regular Yu Yu Hakusho fanfiction usually focuses more on the original story elements and character relationships without these gaming aspects.
One popular 'Yu Yu Hakusho Yusuke Crossover Fanfiction' is the one where he crosses over with the Naruto universe. In this fanfic, Yusuke's tough - guy attitude clashes with Naruto's optimistic nature at first, but they end up learning from each other. Another interesting one has Yusuke in the Bleach world, facing off against Hollows and Soul Reapers. It's really exciting to see how his spirit energy works in a different supernatural setting.