In the story, Naruto's Sage Mode gives him enhanced senses and strength. Batman could use this to his advantage when tracking criminals. He could attach some of his tracking devices to Naruto in Sage Mode so that they can cover more ground quickly. Also, the female characters in the harem might have their own abilities. For example, if there is a character like Ino from Naruto in the harem, she could use her mind - transfer jutsu to communicate secretly between the group, which would be very useful when they are planning against their enemies.
Well, Naruto's Rasengan combined with Itachi's Amaterasu could create a super - powerful attack. Konan could use her paper jutsu to guide or enhance the attack. For example, her paper could be used to direct the path of the Rasengan - Amaterasu combo towards the enemy.
The sharingan from the Naruto universe might be able to analyze the patterns of Ikaruga's power usage. A character like Sasuke could then teach an Ikaruga character how to better control their powers based on the insights from the sharingan. In return, the Ikaruga character could show Sasuke how to use their polarity powers in a more strategic way in combat.
In a story, they could also combine their abilities in a non - combat way. Naruto's ability to connect with people could be used to gather allies. Yugito's knowledge of the tailed beasts could be used to gain more information about a certain threat. Fu's water - sensing abilities could be used to find hidden locations. For example, if they are looking for a hidden lair of an enemy. Fu could sense the presence of water sources near the lair, Yugito could use her knowledge to figure out if there are any tailed - beast - related defenses, and Naruto could convince any nearby villagers to help them in their search.
The characters' abilities can be combined in various ways. For example, a Naruto character could use their chakra to enhance the physical strength of a Resident Evil character. So, if Leon Kennedy was given some chakra by a Naruto ninja, he could become even more powerful in combat. Also, a Resident Evil character's knowledge of weapons and survival skills could be used to help Naruto characters in the Resident Evil world. For instance, Ada Wong could teach Naruto characters how to use guns more effectively. In terms of the harem, a female character's charm or intelligence from either world could be used to influence the group dynamics. A Resident Evil girl could use her scientific knowledge to help Naruto characters understand the viruses better, and in return, they could teach her about chakra.
One way to combine their abilities is through teamwork. The female Inuyasha's Tessaiga sword has unique powers, such as being able to transform. If she were to transform it in the middle of a battle in the Naruto world, it could create a distraction. Naruto could then use his Nine - Tails Chakra mode to quickly move in and deliver a decisive blow. Additionally, the female Inuyasha's resistance to certain types of spiritual attacks could protect Naruto in situations where he is vulnerable to such attacks in the fanfic.
Neeko can shape - shift and Nidalee has her spear - throwing and hunting skills. In a story, Neeko could shift into a small animal to scout out an area, and then relay the information to Nidalee. Nidalee could then use her accurate spear - throwing to take out threats that Neeko has identified.
Slenderman's ability to be invisible or blend into the shadows could be combined with Enderman's teleportation. For example, Slenderman could hide in the shadows while Enderman teleports them both quickly away from danger. Or Enderman could teleport to a location and then Slenderman could use his spooky presence to create a diversion while Enderman steals an important item.
Well, Sylveon's ability to calm others with its presence could be used in a story where Pikachu gets overly excited or scared. For example, if they are in a spooky old Pokemon mansion full of Ghost - type Pokemon. Pikachu might be too afraid to use its electric attacks effectively. Sylveon could calm it down, and then Pikachu could use its attacks more accurately. Also, Pikachu's speed with Quick Attack can be used to get Sylveon out of dangerous situations quickly, like when they are being chased by a large group of wild Pokemon. Sylveon can then use its ribbons to either hold off the pursuers or find a hiding place for them both.
Another way is for them to use their abilities for exploration. Rayquaza can fly high and far, carrying Latias with it. Latias can then use her psychic powers to sense things that are hidden or far away. For instance, they could be looking for a lost Pokémon or a special item. Rayquaza's speed and flight range combined with Latias' sensing abilities would make them a great team for such quests.
Naruto's ability to use chakra could be combined with Deathstroke's physical combat skills. For example, Deathstroke could learn to sense chakra from Naruto and use it to anticipate his opponents' moves better. Naruto, on the other hand, could learn Deathstroke's efficient killing techniques and incorporate them into his ninja attacks in a non - lethal way.