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.
Yang's strength and her ability to absorb hits and then release powerful counter - attacks could work well with some of the more physically - based Tokyo Ghoul characters. If a ghoul has strong physical abilities like Touka, they could team up with Yang. Yang takes the initial hits, gets charged up, and then they both launch a combined attack. Also, Pyrrha's polarity could be used to manipulate the kagune, which are made of a special material. This would give an advantage in battle as she could control the movement and direction of the enemy's most powerful weapon.
If we consider other characters, like Touka from Tokyo Ghoul, her combat skills combined with a parasite - like ability could be really interesting. Imagine if she had some of the regenerative abilities of a parasite. She could take more risks in battles. And for the parasites in Parasyte, if they could somehow access the kagune - like substances from ghouls, it might give them an entirely new form of attack or defense. They could potentially use it to create barriers or projectiles similar to how ghouls use their kagune.
The Survey Corps' ODM gear could be used in new and creative ways in a crossover. They could use it to quickly move around the Tokyo Ghoul cityscape, giving them an advantage against the ghouls. Meanwhile, the ghouls' kagune could be used to attack Titans in ways the Attack on Titan characters haven't seen before. For example, a ghoul could use its kagune to slice through a Titan's nape from a distance.
Kaneki's kagune could be used in combination with Shinichi's parasite - enhanced physical abilities. For example, Kaneki could use his kagune to create a distraction while Shinichi uses his speed and strength to attack the enemy. Or they could work together in a more direct way, with Shinichi using his parasite - hand to hold an enemy in place while Kaneki delivers a powerful kagune strike.
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 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.
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.
Well, in this crossover, the Survey Corps members like Armin would be fascinated by the intelligence of some ghouls. They might try to communicate with them to gain knowledge about their powers. Ghouls like Touka would be in a difficult situation. She would be in a world full of titans, which are much larger and more difficult to deal with than the CCG in her own world. She might have to learn new fighting techniques from the Survey Corps. And characters like Erwin would see the ghouls as a valuable asset, trying to recruit them to fight the titans.
The characters would interact in very unique ways. For example, Harry Potter might be initially cautious around the ghouls from Tokyo Ghoul. He's used to dealing with Voldemort and his Death Eaters, but ghouls are a completely different type of threat. Ken Kaneki, being a half - ghoul, could teach the wizards about the nature of ghouls, and in return, the wizards could show him some amazing magic spells.