Perhaps an ancient artifact in the MHA world has the power of the Naruto toads sealed within it. A villain discovers it first but a young hero - in - training manages to steal it away. Once in their possession, they unlock the toad quirk. They would then need to train hard to master it, just like Naruto did. They could call on the toads for help in battles, use their strong physical attacks and even learn some of the toad - related ninjutsu, adapting it to fit the rules and physics of the MHA world.
They would be very powerful. Just like Naruto can summon giant toads, this character could summon toads in the MHA world. They could use the toads as mounts or have them fight alongside. For example, they could have a toad use its tongue to grab villains and hold them in place.
The architecture of Pompeii could be reimagined as a new type of ninja village. The buildings with their unique styles could house new types of training facilities or hidden chambers. For example, the amphitheater could be a place for large - scale ninja battles or tournaments.
The Rinnegan could be integrated as a mysterious power that emerges in the One Piece world. Maybe it's tied to a long - lost treasure or a forgotten civilization. A character could discover it and start to unlock its abilities, gradually changing the power balance in the Grand Line.
Orihime could be a part of a cross - dimensional experiment gone wrong. So she ends up in the Naruto world. Her presence could disrupt the existing balance, and the story could revolve around how the characters deal with this new, powerful, and somewhat naive character. She might start off as a bit of an outcast because of her different abilities and way of thinking but gradually find her place among the ninja.
He could be a powerful antagonist. Picture him arriving in the Naruto world with his otherworldly powers. His sword skills and magic would make him a formidable foe for Naruto and his friends. He might be interested in obtaining some of the unique powers in the Naruto universe, like the tailed beasts' chakra.
His quirk could be something like super - speed regeneration. In the original Naruto series, he has a great deal of stamina and the ability to heal relatively fast. But with this quirk, he could recover from even the most severe injuries in seconds. This would mean he could keep fighting no matter how badly he was hurt, and his enemies would find it extremely difficult to defeat him.
One way could be through some kind of magical transfer. Maybe a powerful wizard or a deity from a different realm decides to bestow Odin's power upon Naruto. His Sharingan (if he had one) could be enhanced with Odin - like powers, such as the ability to see the truth in all things. Or his Sage Mode could be combined with Odin's power to give him a unique form of combat ability.
Naruto's chakra could be seen as a new type of energy source within the peerage. His shadow clones, for instance, could be used for various purposes like scouting or creating distractions during battles. The Rasengan might be adapted to work against enemies with different magical defenses.
One way could be by having Naruto's ninja skills translate into the GTA 5 world. For example, his ability to run fast and jump high could be like a special ability in the game. He could use his shadow clone jutsu to confuse enemies during heists or missions. Maybe he'd team up with some of the GTA 5 characters and teach them his ninja ways. This would add a whole new dynamic to the GTA 5 gameplay and story.
Weiss's glyphs could be used for various strategic purposes. For example, creating barriers to protect troops or platforms for better vantage points. Blake's shadow clones could be used for deception in combat situations, confusing the enemy. Yang's strength could be utilized in direct combat, like taking on tanks or other heavy machinery. In a WWII fanfic, their powers would add a unique and fantastical element to the historical setting.