Well, Nagisa's ability to turn invisible could be used in the Touhou world for some sneaky spying. He could gather information on enemies while the Touhou characters, like Marisa with her powerful magic, provide the firepower. Their combined efforts would make them a formidable team against any foe.
Korosensei's super speed and intelligence could be used to outwit the more powerful and magical Touhou enemies. For example, he could quickly analyze their attack patterns and weaknesses. The Touhou characters, on the other hand, like Sanae with her ability to control the elements, could use their powers to set up traps or defenses. In a fight, Korosensei could dodge attacks and then the Touhou characters could strike back with their magic at the right moment.
Another plot could involve a crossover of the two worlds' educational systems. The students from Ansatsu Kyoushitsu might attend classes in the Touhou world, learning magic instead of assassination. And vice versa, some Touhou characters could come to the school to learn about modern - day combat skills and strategies.
One common theme is friendship. When characters from different worlds or series cross over, they often form new friendships or strengthen existing ones. Another theme is the clash of different powers and abilities. Since the characters in 'ansatsu kyoushitsu' have their own unique skills, when they cross over, it's interesting to see how they compare and combine with others.
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.
Naruto's Rasengan could be combined with Aladdin's acrobatic skills. Imagine Aladdin using his speed and agility to get close to an enemy while Naruto forms a Rasengan, and then Aladdin quickly delivers the Rasengan - powered attack. It would be a very effective and unexpected combination.
Naruto's Rasengan could potentially be enhanced with the power of Okami's Celestial Brush. Imagine a Rasengan that can not only cause physical damage but also purify the area it touches, similar to how Amaterasu in Okami purifies the corrupted areas. For the Okami characters, Issun could use his small size and agility in combination with Naruto's shadow clone jutsu. He could ride on the clones and direct them to different strategic positions during a battle. Amaterasu from Okami could combine her fire - like powers with Sasuke's fire jutsu, creating an even more intense and powerful flame attack.