What are some plot ideas for a Naruto and Bleach fanfic involving help from a stranger?

One possible fanfic could be where a stranger, who has some sort of special power or knowledge, enters the Naruto and Bleach universes. Maybe this stranger is from a different dimension entirely. The stranger could help the main characters in both series to overcome a common enemy that somehow threatens both their worlds. For example, in Naruto, the stranger could assist Naruto in finding a new way to deal with the Akatsuki, while in Bleach, the stranger could help Ichigo understand his Hollow powers better in the face of a new and powerful arrancar threat.

A simple plot could be that Ruby is a foreign ninja who comes to the Leaf Village seeking asylum. She has a special ability to control plants, which is unheard of in the Naruto world. The Leaf Village ninja are initially suspicious of her but as they get to know her, they realize she can be an asset. Together with Naruto, they face off against an enemy who is using dark magic to wither all the plants in the land, and Ruby's powers are crucial in reversing this.

A plot could involve a group of rogue ninjas who find a way to summon an Altera - like entity. This entity starts causing chaos in the ninja world by disrupting the natural flow of chakra. The main characters then have to find a way to stop it, which might involve learning about ancient sealing techniques that were once used to deal with similar threats. It could also lead to the discovery of a hidden connection between the Naruto world and the realm from which Alteras originate.

One idea could be a crossover where the spiritual energy from Bleach somehow intersects with the magic in the worlds related to Yen Sid and Xehanort. Maybe a character from Bleach gets transported to their realm and has to navigate the complex power dynamics between Yen Sid's magic and Xehanort's schemes.

A popular storyline is a tournament - style fanfic. Characters from Naruto (like Naruto and Sasuke), and from Bleach (such as Ichigo and Byakuya) are forced to compete in a grand tournament. The battles are intense, with each character using their unique abilities. It's exciting to see how Naruto's Rasengan would fare against Ichigo's Getsuga Tensho.

A cool plot for a 'bleach sleepover' fanfic could involve the characters from different factions in 'bleach' coming together for a sleepover. For example, the Shinigami and the Arrancar. At first, there's tension, but as the night progresses, they start to understand each other better. They could play games like truth or dare, which leads to some really interesting character revelations and unexpected alliances forming. This could also set the stage for future interactions in the 'bleach' universe outside of the sleepover.

Perhaps a 'bleach school fanfic' could focus on the relationships between students. For example, two characters who are normally rivals have to team up for a project. They slowly learn to understand and respect each other's abilities. Or it could be about a group of students trying to solve a mystery that is plaguing the school, like strange disappearances that seem to be related to some dark spiritual force.

One idea could be a dragon from a hidden realm in the Bleach universe emerging and forging an alliance with Ichigo. The dragon could have unique powers that help Ichigo in his battles against the Hollows. For example, it might be able to breathe a special type of reiatsu - infused fire that can purify Hollows more effectively than a normal Soul Reaper's sword.

Another fanfic could focus on a training arc. Rossweisse wants to learn some new combat techniques and Naruto decides to train her. He could teach her about chakra control and how to use it in a way similar to magic. They might face challenges during the training, like unexpected attacks from other characters who are jealous of their growing bond.

One idea could be a story where Naruto and Haku team up on a special mission. They could start off not trusting each other much, but as the mission progresses, they come to respect and rely on one another's skills. For example, Naruto's brute strength combined with Haku's stealth and water jutsu could make for an interesting dynamic in overcoming the mission's obstacles.