Let's start with Naruto's ability to control the Nine - Tails' chakra. In a crossover, this could be related to the power of the Philosopher's Stone in Fullmetal Alchemist. Maybe the Nine - Tails' chakra has some alchemical properties that can be harnessed. Edward could study this and find a way to use it in his alchemy. On the other hand, the alchemical transmutation circles could be used as a form of jutsu in Naruto. The ninja could draw these circles on the ground or on their bodies to activate different powers. For example, Rock Lee, who doesn't have natural chakra control, could use alchemical transmutation to enhance his physical abilities. He could transmute his muscles to be stronger or more elastic. And for the Homunculi, they could use their immortality to outlast the ninja in long - term battles and learn their techniques over time.
Well, consider Wendy's healing magic. In a crossover, she could use her magic to heal the wounds caused by alchemical experiments gone wrong or battles in the Fullmetal Alchemist world. In return, the alchemists could teach her about the properties of different herbs and substances that could enhance her healing magic. Gajeel's iron dragon slayer magic could interact with the metal - based alchemy. He could use his magic to shape and manipulate metal in ways that the alchemists find fascinating. And then there's Mirajane's transformation magic. She could transform into forms that are better suited to deal with the alchemical threats in the Fullmetal Alchemist world, while the alchemists could help her understand the physical and chemical changes that occur during her transformations.
The characters' abilities can interact in really cool ways. For instance, Naruto's Shadow Clone Jutsu could be used in alchemical experiments. He could send clones to gather materials or perform different steps of an alchemical process simultaneously. In return, Edward's alchemy could be used to create structures that are useful for ninja battles, like creating instant fortifications or traps.
The pilots of Gundam Wing have their combat skills in operating mobile suits. When combined with the alchemical abilities in Fullmetal Alchemist, it can be really interesting. For example, Heero Yuy's combat instincts could be enhanced by Edward Elric's ability to quickly analyze and use alchemy to create strategic advantages on the battlefield. Maybe they could combine the Gundam's firepower with alchemical constructs for a more powerful attack.
The alchemists' ability to transmute matter could be combined with Pride's shape - shifting abilities. For example, an alchemist could transmute a basic structure, and then Pride could use his powers to shape it into a more complex and efficient form. This would require a lot of cooperation between the characters, which could be interesting to write about.
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.
Naruto's ability to use chakra and his shadow clone jutsu could be combined with the Ninjago ninjas' elemental powers. For example, Naruto could create shadow clones to help Kai with his fire - based attacks in a battle.
The sharingan ability from Naruto's world could be used in an interesting way with the Voltron technology. For example, a character with the sharingan could quickly analyze the weak points in the Galra's defenses or the mechanisms of the Voltron lions themselves, allowing for more efficient repairs or strategic attacks. And Voltron's ability to form into a giant robot could be used as a cover or a platform for Naruto characters to perform their long - range jutsus from a safe vantage point.
Naruto's ability to use chakra could be combined with Batman's gadgets. For example, Naruto could use his chakra to power up some of Batman's energy - based weapons. Batman's detective skills could help Naruto in his ninja missions in the Naruto world. He could analyze the enemy's patterns and strategies better. Also, Naruto's shadow clone technique could be used for reconnaissance in Gotham, while Batman's stealth could be applied in the Hidden Villages for spying on potential threats.
Naruto's Rasengan could be combined with Kirby's inhaling ability. Kirby could inhale an object and then spit it out with the force of a Rasengan. Or Naruto could use his shadow clones and have each clone team up with a Kirby ability. For example, one clone could work with Kirby's sword ability to fight enemies.