The idea of the two different worlds colliding is also fascinating. In a 'bleach x naruto crossover fanfiction', we might see the Hidden Villages from Naruto co - existing with the Soul Society in Bleach. How would they interact? Would there be trade, alliances or conflicts? This could lead to really engaging storylines.
It's hard to say for sure. Naruto in his Sage of Six Paths mode is extremely powerful, with access to a vast amount of chakra and the ability to create and manipulate Truth - Seeking Balls. But Ichigo, when he reaches his final form, can also be a force to be reckoned with, having the combined powers of his Hollow, Quincy, Soul Reaper, and Fullbringer heritage.
A Naruto x Rukia kiss in such a fanfiction would likely be a very emotional moment. Since they are from different universes, it would represent a connection that defies the norms of their respective worlds. It could be that Naruto is drawn to Rukia's calm and strong - willed nature, while Rukia is intrigued by Naruto's never - give - up attitude. The kiss might be a culmination of a long - building, unspoken attraction that finally surfaces in a moment of vulnerability.
One idea could be that Naruto and Ichigo meet in a dimension where their powers are combined. They have to fight a new, powerful enemy that threatens both their worlds. For example, a villain who can manipulate the energy of chakra and reiatsu at the same time.
Perhaps in this crossover fanfiction, there is a prophecy in both the Naruto and Bleach worlds about a combined force that can save the multiverse from a great evil. Naruto and Yoruichi are the key components of this prophecy. At first, they don't get along as they have very different personalities and ways of doing things. Naruto is more straightforward and brash, while Yoruichi is sly and mysterious. But as they face challenges together, they learn to work as a team and combine their powers of ninjutsu and shinigami abilities to defeat the ultimate threat.
I really like 'The Shinigami and the Ninja'. It's a well - written fanfic where the author does a great job of integrating the different mythologies and power systems. You get to see Bleach characters like Rukia in the Naruto world, dealing with things like chakra and ninja villages. It adds a fresh twist to both universes.
One interesting idea could be that characters from Bleach are somehow transported to the Naruto world during the Chunin Exams. For example, Ichigo could end up participating in the exams. He might use his Soul Reaper powers in the forest of death, which would give him an edge against the ninja there. His Zanpakuto skills could be misinterpreted as some kind of advanced ninja tool or jutsu.
It's really hard to say who would be the strongest. Naruto has the power of the Nine - Tails and all his ninja skills. Ichigo from Bleach has his Hollow and Soul Reaper powers. And characters in Fairy Tail like Acnologia are extremely powerful. But if I had to pick, I might say Ichigo. His ability to constantly evolve and his powerful sword strikes combined with his Hollow form could give him an edge over the others in a chaotic crossover battle.
There could be some really interesting fanfictions on this. Maybe in a multiverse - type scenario where Naruto and Rukia meet. However, it's a very unique crossover. It would require some creative writing to make their relationship believable, especially for a kiss to happen. The two characters come from very different worlds with different power systems and cultures. But that's the beauty of fanfiction, it can break boundaries.
Naruto and Ichigo would be an obvious and exciting pairing. They both have a strong sense of justice and a determination to protect their friends. They could learn a great deal from each other's fighting styles and powers.