Perhaps a story where Naruto is transported to Garnet's world. He has to adapt to the new environment while Garnet tries to figure out who this strange and powerful newcomer is. Along the way, Naruto could teach Garnet some of his ninja techniques, and Garnet could introduce Naruto to the magic and technology of her world.
One plot idea could be Zidane and Garnet going on a journey to discover a long - lost magical artifact. Along the way, they face various challenges that test their relationship and individual strengths.
One plot idea could be Naruto trying to understand Pain's ideology on a deeper level while in the midst of battle. Maybe he discovers some similarities between their motives, like their desire for peace in their own ways. Another could be Naruto getting trapped in one of Pain's jutsu and having to experience Pain's past traumas first - hand, which changes his perspective on him.
A more complex plot could be set in a time when there is a famine in the village. Ayame's ramen shop is struggling to get ingredients. Naruto, being the hero he is, offers to help. They travel to different lands to trade for ramen ingredients. Along the way, they encounter various characters from other villages, some friendly and some hostile. This journey not only strengthens their friendship but also helps to save the ramen shop and feed the village.
Another plot could involve Hancock falling ill in the Naruto world. Naruto, with his strong sense of helping others, tries to find a cure for her. This could lead them on a journey across different ninja villages, where they encounter various characters and learn about each other's cultures. Along the way, a romantic relationship might start to develop between them.
Well, a cool plot could be that there is a mysterious force that links Naruto and Rin across different dimensions. Naruto discovers this connection and tries to find Rin in another dimension. As he does, they both realize that they have a shared destiny to save both their dimensions from a common threat. Maybe it's an ancient evil that was once sealed away but is now breaking free.
One plot idea could be that Selene, with her unique powers, somehow gets transported to the Naruto universe. She meets Naruto and initially they are at odds because of their different ways of handling things. But as they face a common enemy, they start to understand each other and work together. Their combined skills, Naruto's ninjutsu and Selene's otherworldly powers, make for an exciting adventure against the foe.
One idea could be that Naruto, through some magical portal, ends up in Yennefer's world. He could use his ninja skills to help Yennefer in her quests. For example, Naruto's shadow clone jutsu could be used to confuse enemies while Yennefer casts her powerful spells.
One plot idea could be that Naruto, somehow transported to the world of Lisbeth, teams up with her to fight against a new threat that combines the magic from her world and the ninja skills from his. They learn from each other's combat styles and develop a strong friendship along the way.
Maybe a story where Kurotsuchi discovers a new jutsu that she can't control and Naruto helps her. Naruto, with his experience in mastering difficult techniques, offers his guidance. As they work together to tame the jutsu, they learn more about each other's villages and cultures, and this new - found understanding strengthens their bond.
A plot could revolve around Naruto being magically transported into a different era where yukatas are the norm. He has to adapt to this new world while still being Naruto. He might use his ninja skills in unexpected ways in this yukata - wearing society, like using his shadow clone jutsu to help with traditional yukata - making tasks.