Naruto's ability to use chakra could be combined with Sebastian's demonic powers in interesting ways. For example, Naruto could use his chakra to enhance Sebastian's physical attacks. Or Sebastian could use his knowledge of the supernatural to help Naruto better understand and control his bijuu chakra.
The Sharingan from Sasuke in Naruto could be a really interesting addition to the Black Butler world. Sebastian could potentially use the Sharingan's ability to copy techniques to learn new ways to serve Ciel or fight enemies. And Naruto's ability to transform, like his Nine - Tails form, could be used to intimidate the foes in the Black Butler universe. For instance, when facing a powerful demon, Naruto's Nine - Tails form could give Sebastian and Ciel an edge in battle as it is a display of overwhelming power.
Kagome's spiritual arrows could be enhanced by Grell's death scythe in a strange way. Maybe their combined powers could create a new weapon or a powerful blast that could defeat a very strong foe. Also, Shippo's illusions could be used to deceive the enemies, and Bardroy's explosives could be set off at the right moment to create chaos among the enemy ranks, which would give Inuyasha and the Black Butler characters an advantage in battle.
Well, Naruto has his Rasengan, a powerful spinning ball of chakra. Ultear could use her time - magic to age or de - age the target area where the Rasengan is about to be launched. If she ages the area, it might make the ground harder, increasing the impact of the Rasengan. Or if she de - ages it, she could create a soft, muddy area that would trap the enemies in the Rasengan's path. Also, Ultear's ability to see into the future could help Naruto anticipate his opponents' moves better, allowing him to use his ninja skills more effectively.
Naruto's shadow clone technique could be combined with Goku's ability to split into multiple versions of himself during the Kaioken technique. This would create a horde of super - powered clones that could overwhelm opponents. Also, Naruto's Rasengan could be infused with the energy of a Ki blast, making it even more powerful. And Goku's Instant Transmission could be used in combination with Naruto's speed to create an unbeatable movement ability.
If we think about it, Naruto's shadow clones could be used in interesting ways in the Sailor Moon universe. He could send his clones to gather information about the villains while the Sailor Guardians are preparing their attacks. Luna's ability to communicate with Sailor Moon could be extended to also communicate with Naruto's clones. Also, Sailor Moon's transformation powers might be able to affect Naruto in a way that gives him a temporary boost in speed or strength similar to when she transforms.
Naruto's ability to use chakra and his powerful jutsu like the Shadow Clone Jutsu could be combined with Hanabi's Hyuga clan techniques. In the Sekirei world, they might use these combined abilities to take on stronger opponents. For example, Naruto could create clones to distract enemies while Hanabi uses her Byakugan to find weak points and strike.
Naruto's ability to create shadow clones could be used in strategic ways in Rias's battles. For example, he could send clones to scout out the enemy while the devils in Rias's harem set up their attacks. His Rasengan could also be combined with the devil's energy - based attacks. Maybe a devil could enhance the power of the Rasengan with their own magic. Also, Naruto's chakra control could help the devils in Rias's group to better control their own internal energy sources, as chakra control is a very refined skill in the 'Naruto' universe.
A lot of the time, Doomguy's indomitable will and his combat experience in the face of demons can be paired with Naruto's ninja skills. Picture Doomguy charging into battle, and Naruto using his wind - style jutsu to enhance Doomguy's attacks, like making his melee strikes even more powerful with gusts of wind.
Well, Naruto's Rasengan could potentially be infused with black lightning. Imagine a Rasengan crackling with black lightning energy, making it even more destructive. It would be a powerful combination of Naruto's chakra control and the unique energy of black lightning.
The bending abilities from Avatar: Pandora could combine with Naruto's chakra - based ninjutsu in interesting ways. For instance, a water bender could enhance a water - style ninjutsu by adding their unique bending style to it, making it more powerful and fluid.
Naruto's ability to use chakra could be combined with the high - tech gadgets in Total Recall. For example, he could use his chakra to power up some of the weapons or vehicles in the Total Recall world. His shadow clone jutsu could also be used in interesting ways. He could send clones to different parts of the Total Recall world to gather information while he focuses on a main task.