In a Bleach vs Fairy Tail fanfiction, a really cool idea would be to have the worlds of the two series collide. So, instead of just individual battles or team - ups, the entire Hueco Mundo and the Fiore Kingdom are somehow connected. The Arrancars start causing chaos in Fiore, and the Fairy Tail guild has to deal with them. At the same time, the Soul Society might be interested in the magic that exists in the Fairy Tail world. This could lead to a complex web of relationships and conflicts. For instance, Grimmjow could become a major antagonist in the Fairy Tail world, and some of the more powerful mages might be able to hold their own against him. And perhaps some of the Soul Reapers would be intrigued by the unique magic of Fairy Tail, like Erza's requip magic.
A great crossover concept is the idea of power - swapping. Imagine some of the characters from Bleach and Fairy Tail swapping their powers. Natsu with a zanpakuto or Ichigo with dragon slayer magic. This would completely change their fighting dynamics and how they interact with their respective worlds. It could also lead to some really funny and interesting situations. For example, Natsu might struggle to understand the concept of a zanpakuto spirit at first, while Ichigo could have a hard time controlling the raw power of dragon slayer magic without proper training. And it would be interesting to see how their friends and allies react to these changes as well.
One interesting crossover idea could be a battle tournament where characters from both Bleach and Fairy Tail participate. For example, Ichigo from Bleach could face off against Natsu from Fairy Tail. Their different fighting styles, with Ichigo's zanpakuto and Natsu's dragon slayer magic, would make for an exciting showdown. Another idea could be a team - up scenario. Maybe some of the Soul Reapers and Fairy Tail mages have to work together to defeat a common, powerful enemy. This would allow for interactions between characters who have different powers and personalities, like Rukia and Lucy. They could learn from each other's magic systems and grow as characters during the adventure.
A cool concept would be to combine the magic systems. So, the Soul Reapers' Kidou could be related to Fairy Tail magic in some way. For example, a Soul Reaper could teach some of the Fairy Tail mages how to use Kidou for a special mission against a common enemy that has the ability to disrupt both the Soul Society and the Fairy Tail world.
One idea could be that Ichigo from Bleach somehow ends up in the Fairy Tail world. He could join forces with Natsu and the gang to fight a common enemy. Maybe an Arrancar has escaped to the Fairy Tail universe and is causing chaos, and Ichigo's skills as a Soul Reaper are needed to stop it.
Erza and Byakuya would be an interesting pair. Erza's leadership and unwavering determination in Fairy Tail, and Byakuya's noble and stoic nature in Bleach. They might initially have a bit of a standoff due to their pride, but as they face challenges together, they would come to understand each other's values and form a mutual respect.
The most interesting aspect is seeing the characters interact. For instance, seeing how the stoic characters from Bleach react to the more exuberant ones in Fairy Tail can be really entertaining.
One interesting plot point is the clash of magic systems. In 'bleach and fairy tail crossover fanfiction', you often see how the spiritual powers from Bleach interact with the magic of Fairy Tail. For example, a shinigami's zanpakuto abilities against a Fairy Tail wizard's elemental magic can create some really intense battle scenes.
One idea could be a tournament where characters from Bleach and Fairy Tail compete. For example, Ichigo from Bleach could face off against Natsu from Fairy Tail in a battle of strength and sword skills versus fire - based magic. Another plot could involve a common enemy that forces the two groups to team up. They start off distrusting each other but gradually learn to work together. Maybe a powerful dark force is threatening both their worlds and they have to combine their powers to defeat it.
A time - travel crossover might be a hit. For instance, if characters from Bleach, Fairy Tail, Naruto, and One Piece were sent back in time to a crucial point in one of the series' histories. They could end up changing the course of events, which would have a ripple effect across all the series. This would allow for a lot of creative interpretations of how the different powers and personalities interact with the altered timelines.
One interesting plot could be the characters from Fairy Tail and Bleach teaming up to fight a common enemy that threatens both their worlds. For example, a powerful dark mage from Fairy Tail's world teams up with a rogue Hollow from Bleach, and the heroes have to combine their unique powers to stop them. The Fairy Tail mages could use their magic, like Natsu's fire magic, while the Soul Reapers use their Zanpakuto abilities.
But we also can't forget about Ichigo in his final form. He has the power of a Soul King and his combat skills are top - notch. If he were to enter the Fairy Tail world with all his power, he would be able to take on most threats with ease. It really depends on how the crossover is written and what kind of challenges are presented to each character.
It's hard to say for sure. Ichigo in his final form in Bleach has extremely high power levels. He can cut through almost anything with his sword and has great speed and strength. However, in Fairy Tail, Acnologia is a very powerful dragon slayer. His dragon form gives him incredible power and he has a lot of combat experience. So it could be either of them depending on how the fight is set up.