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.
Naruto's ninjutsu skills like the Rasengan could be combined with Tifa's martial arts and her Limit Breaks. For example, Naruto could use his shadow clones to surround an enemy while Tifa uses her physical strength to deliver a powerful blow. Then, Naruto could finish it off with a Rasengan enhanced by Tifa's energy or magic.
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.
One way to combine the abilities is through training. If Naruto trained with a Kryptonian and a Saiyan, he could learn to use his chakra in new ways. Maybe he could infuse Kryptonian solar - powered energy into his chakra, and then use Saiyan - like combat styles. The Saiyan's agility and combat instincts could also be added to Naruto's already impressive ninja skills, creating a whole new set of abilities.
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.
Naruto's ability to use chakra and perform jutsus could be combined with Tamarron's Kryptonian powers. For example, Tamarron could use her super strength to create a distraction while Naruto uses a clone jutsu to attack from multiple angles. Karin's ability to sense chakra could be used to detect hidden enemies or power sources. So, in a battle scene, Karin could alert Naruto and Tamarron to an approaching threat, and they could then use their combined powers to defeat it.
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.
The simplest way could be through a power - up item. For example, Naruto could find a special Power Rangers - like device that allows him to use their powers in addition to his ninja skills. Maybe it's a bracelet or a sword that channels the energy of the Power Rangers' Megazords. In this way, his harem of female characters from both universes could also be involved in the process of unlocking or enhancing these combined powers.
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.