The exploration of different worlds. Since it's a crossover, there's always the theme of characters exploring the new world they find themselves in. Whether it's a Bleach character in Inuyasha's feudal Japan or vice versa, they have to understand the new rules, cultures, and threats of that world. This leads to a lot of interesting story developments as they compare and contrast the two universes.
Power and growth. Both Inuyasha and Bleach have characters with different levels of power. In crossovers, often a character from one series has to adapt and grow in the other's world, facing new challenges that test their power.
Friendship and teamwork. In both shows, the main characters rely on their friends. In crossover fanfiction, this is often emphasized as characters from different universes have to work together. For example, Inuyasha's group might team up with Ichigo's friends to fight a common enemy. This theme of different characters coming together and learning to trust and cooperate is very common.
One common theme is power comparison. Fans often like to see how the powerful swords in Inuyasha, like Tessaiga, compare to the zanpakuto in Bleach. Another theme is character interaction. It's interesting to see how the brash Inuyasha would interact with the determined Ichigo. Also, the exploration of different worlds is a theme. The feudal - era - like world of Inuyasha and the complex Soul Society in Bleach offer a lot of room for exploration when the characters cross over.
One common theme is the clash of different power systems. In Bleach, there are the Soul Reaper powers like zanpakuto and kido, while in Inuyasha there are demon powers and spiritual powers like the Tessaiga. Fanfics often explore how these powers interact when the two universes collide.
One common theme is the clash of different cultures. Naruto's world is more about ninja villages and modern - ish (for a fantasy world) structures, while Inuyasha's is a feudal era world. So when they cross over, there's often exploration of how these different cultures interact.
One common theme is the clash of different worlds. Inuyasha is set in a feudal era full of demons and magic, while Ranma has a more modern (but still very Japanese - culture - influenced) world with martial arts and strange curses. So when the two are crossed over, the difference in their worlds often leads to interesting plotlines. Another theme is the interaction between the characters. For example, Inuyasha's brash and impulsive nature vs Ranma's own quick - tempered but also comical personality can create a lot of humorous and tense situations.
Power - up is a common theme. For example, a character from Naruto might gain some of the powers of a Soul Reaper from Bleach. This could be something like Naruto getting the ability to use a Zanpakuto.
One common theme is power combination. Since it's a crossover, fans like to see how the powers from different series interact. For example, in a Bleach RE and Dragon Ball Z crossover, the reiatsu powers combined with ki blasts can create some really epic battles.
Romance is a very common theme. Since it's a harem - style, there's usually multiple love interests for the main character. Another theme is the crossover aspect, which often involves integrating different fictional universes and their rules, like combining Bleach with other anime or game worlds.
One common theme is the clash of cultures. Kakashi comes from the ninja world of Naruto, and when he enters the Bleach universe, there's a contrast between the two. For example, the way they handle combat and the hierarchies in their respective worlds.
One idea could be that Ichigo from 'Bleach' somehow gets transported to the world of 'Inuyasha'. He might meet Inuyasha and they could team up to fight a common enemy, like a powerful demon that has somehow gained the powers of Hollows from 'Bleach'. Their different fighting styles would make for an exciting combination.
A common theme is the clash of different power systems. Naruto has his chakra and various jutsu, while Inuyasha has his demon powers. When the Juubi is added into the mix, it creates a complex power dynamic.