Weiss's glyphs and ice - making abilities could merge with Kingdom Hearts' ice - based spells. She could create more complex and powerful ice structures using both her glyphs and the Keyblade's ice magic. Yang's strength - based attacks could be amplified by the power of the Keyblade. Maybe she could use the Keyblade's energy to create shockwaves with her punches. The Heartless' ability to disappear and reappear could be incorporated into the RWBY characters' fighting styles. They could learn to use stealth and quick movements like the Heartless, while still maintaining their own unique abilities. And the Keyblade's ability to unlock different things could have an interesting application in Remnant, like unlocking hidden chambers or secrets related to the Maidens.
For Blake, her shadow - based abilities could interact with the Darkness in Kingdom Hearts. She could use the Darkness in a more controlled way, similar to how Riku does in Kingdom Hearts. Her Semblance could be enhanced to allow her to move through shadows even faster and more stealthily. Aqua's water - based magic could combine with Weiss's ice magic to create new and powerful ice - water attacks. The RWBY characters' Aura could also be affected by the Light and Darkness from Kingdom Hearts. They might be able to use the Light to strengthen their Aura or use the Darkness to gain new powers, but at a risk. And the Keyblade's transformation abilities could be used by the RWBY characters. For example, Ruby could transform her Crescent Rose into a more powerful form using the Keyblade's power.
Ruby's speed and scythe - wielding skills could be enhanced by the Keyblade's magic. For example, she could use the Keyblade's power to make her Crescent Rose even more powerful, like adding elemental attacks. Sora's ability to quickly adapt to new situations and his combat skills with the Keyblade could be combined with the Huntsmen training in RWBY. He could learn new fighting styles from the RWBY characters and they could learn from his experience with different enemies. Donald and Goofy's support abilities could be used to assist the RWBY teams in battles, like Donald's magic for healing or Goofy's defense - boosting skills.
Well, Sora's ability to use the keyblade could be combined with Scrooge McDuck's combat skills. Scrooge is quite a fighter, and with Sora's keyblade, they could make a formidable team. For example, Sora could use his magic spells while Scrooge uses his cane to fend off enemies.
Well, Naruto's Rasengan could be combined with Ruby's Crescent Rose. For example, Ruby could use the spinning force of the Rasengan and incorporate it into her scythe attacks. It would add a new level of power and unpredictability. Sasuke's Chidori could be used in a similar way, perhaps with Weiss' Glyphs. She could create Glyphs that enhance and direct the power of the Chidori for more precise attacks. And Naruto's shadow clones could be used in RWBY battles. They could be used to distract Grimm while the RWBY characters set up more powerful attacks.
Well, Soldier 76 has his healing ability. In a crossover, this could be used to keep RWBY characters alive during tough battles. Let's say Weiss is in a fight and gets injured. Soldier 76 could heal her up quickly so she can continue using her Glyphs. His ultimate ability, the Tactical Visor, could be combined with Ruby's sniper skills. They could both target enemies from afar and take them out more efficiently. Also, his combat experience and training could be shared with the RWBY team, improving their overall combat strategy. And the RWBY characters' unique Semblances could also enhance Soldier 76's abilities. For instance, if he teams up with Pyrrha, her polarity semblance could be used to manipulate the path of his bullets.
Ruby's speed and scythe - wielding skills could be combined with Kaneki's kagune attacks. For example, Ruby could use her speed to quickly dodge an enemy's attack and then Kaneki could follow up with a powerful kagune strike. Weiss's glyphs could be used to enhance or control the movement of a ghoul's kagune. Blake's shadow clones could be used to confuse the ghouls while the Tokyo Ghoul characters attack from different angles.
The Resident Evil characters are used to dealing with limited resources and a survival - horror environment. The Kingdom Hearts characters, on the other hand, are more used to a more fantastical and adventure - based combat. In a crossover fanfiction, the Kingdom Hearts characters could learn from the Resident Evil characters' resourcefulness. At the same time, the Resident Evil characters could gain new powers or abilities from the Kingdom Hearts world, like the ability to travel between worlds or use magic. This exchange of abilities could lead to some really exciting and unexpected combat scenarios.
Dante's devil-trigger ability could combine well with Ruby's semblance. Ruby can move at high speeds, and when Dante enters devil - trigger, his enhanced speed and power could be added to Ruby's, creating a super - fast and powerful combo in battle. For instance, they could perform a combined attack where Ruby zips around enemies, and Dante follows up with his powerful sword strikes in devil - trigger mode.
Let's consider the Reds and Blues' weaponry. Their guns and high - tech gadgets could be combined with RWBY's unique weapons. For instance, a character like Tucker with his sword could potentially upgrade it with some Red vs Blue tech. On the other hand, RWBY characters' Semblances could be used to enhance the performance of Red vs Blue weapons. For example, Weiss's glyphs could be used to improve the accuracy or power of a Red vs Blue sniper rifle. And the teamwork aspect, like how the Reds and Blues communicate during combat, could be adopted by the RWBY teams to improve their own coordination.
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.