Ghost Rider's chain could be used in a really cool way in the Naruto world. Naruto could learn to use it like a new type of ninja weapon. He could combine it with his shadow clone jutsu, where the clones hold the chain and use it to trap enemies. Meanwhile, Ghost Rider could gain some of Naruto's speed and agility, making his combat even more effective.
Naruto's Rasengan could potentially be combined with Ghost Rider's Penance Stare. Imagine Naruto creating a Rasengan and infusing it with the spiritual power of the Penance Stare. It would be a super - powerful attack that not only physically damages the enemy but also makes them face their sins.
When Naruto enters his Nine - Tails Chakra mode, his power level skyrockets. If he combines this with Ghost Rider's hellfire, it would be a fearsome combination. The intense heat of the hellfire along with the raw power of the Nine - Tails could incinerate any opponent. And Ghost Rider might also be able to use the Nine - Tails' chakra to enhance his own hellish powers, like making his chain even hotter or his motorcycle faster.
Well, Naruto has his Nine - Tails chakra mode. If he combined that with the Ghost Rider's power, he could have a super - charged form. The Nine - Tails' chakra could fuel the Ghost Rider's flames, making them hotter and more destructive. And the Ghost Rider's ability to sense evil could help Naruto identify hidden threats in the ninja villages.
Well, if Kamen Rider and a Castlevania character combined their abilities, it could be really cool. For instance, a Kamen Rider's speed could be used to quickly dodge the attacks of Castlevania's slow - moving but powerful enemies like the Death monster. And the Castlevania character's weapon skills, say Trevor Belmont's whip skills, could be enhanced by the Kamen Rider's power - up items.
Thor's lightning could be combined with Naruto's Rasengan. Naruto could infuse Thor's lightning into his Rasengan, creating a super - powered attack that is both destructive and fast. It would be like a spinning ball of lightning that could pierce through almost anything.
Naruto's ability to create multiple shadow clones could be used in combination with Superman's super - strength. The clones could help Superman in tasks that require a lot of manpower, like rebuilding a city after a disaster. Superman's heat vision could also be enhanced by Naruto's chakra. Naruto could channel his chakra into Superman, allowing him to fire more powerful heat vision blasts.
Well, Naruto could use his shadow clone jutsu to create multiple copies of himself. These clones could then help Megaman in combat, for example, by distracting enemies while Megaman fires his buster. And Megaman could upgrade Naruto's weapons with his own technology, like giving Naruto's kunai some kind of energy boost.
Naruto's shadow clone jutsu could be combined with 009's super strength. For example, Naruto could create multiple clones, and each clone could work with 009 to enhance his physical attacks. The clones could also act as decoys while 009 uses his cybernetic abilities to launch a surprise attack.
Naruto's Rasengan combined with Hinata's Gentle Fist could create a really powerful attack. Maybe Naruto could infuse his Rasengan with Hinata's chakra control, allowing it to be more precise and targeted. And if Kaguya's powers were added to the mix, say her ability to create dimensions, they could use that to their advantage in battle. For example, they could trap enemies in a dimension and then attack them with their combined Naruto - Hinata attack.
Naruto's ninjutsu and Tonks' magic could create some really cool combinations. For instance, Naruto could use his Rasengan while Tonks uses her magic to enhance its power. Or Tonks could change into Naruto to distract enemies while the real Naruto attacks from a different angle.
If Naruto was in the Splatoon world, his Shadow Clone Jutsu could be used in interesting ways. He could send clones to cover more ground during an ink battle, confusing the enemy. And for the Inkling's part, their ability to swim in ink could help Naruto move around in ink - filled areas more easily. They could also use their ink guns to provide cover for Naruto while he attacks up close.
Well, if Izaya from Durarara and Shikamaru from Naruto were to team up, Izaya's intelligence in manipulating people and Shikamaru's strategic thinking could create some really devious plans. Shikamaru could use his shadow - binding jutsu to physically restrain opponents while Izaya uses his words to mislead and confuse their enemies. Another example is if Celty's shadow powers were combined with Naruto's chakra - enhanced strength. Naruto could use Celty's shadows to extend his reach in battle, like creating shadow - arms that are empowered by his chakra.