Another way is through a magical or technological device. There are fanfictions where a device created by Ozpin in Remnant has the ability to access different universes. When it accidentally connects to Captain Marvel's world, it sets the stage for the two groups of characters to meet. This often leads to interesting cultural exchanges as the RWBY characters are exposed to Captain Marvel's more advanced technology and different moral code.
In some fanfictions, the threat that unites them helps in blending the worlds. Say there's a powerful enemy that can only be defeated by combining the powers of both groups. This forces the RWBY characters and the Guardians to work together. The RWBY characters' Semblances and the Guardians' unique abilities become complementary. And the different settings, like the planets in Guardians of the Galaxy and the kingdoms in RWBY, create an interesting backdrop for the story.
The bright and colorful world of RWBY with its various kingdoms and unique landscapes could contrast with the more technological and urban - like settings often seen in Kamen Rider Gaim. But they could blend in a way that the advanced technology of Gaim is incorporated into RWBY's world, like Gaim's devices being used to enhance Dust - based weapons.
Well, first they study both universes thoroughly. Then they start by introducing elements from one world into the other. Maybe they bring Naruto's jutsu into Elena's town. They also have to think about how the characters would react. So if Naruto meets Elena, how would they communicate? Writers also use plot devices like a common threat to bring the two worlds closer together. This way, they can create a seamless blend of the Naruto and Elena worlds in the fanfiction.
The worlds might blend through the use of shared magical elements. For instance, both have magical creatures. The gargoyles' ability to turn to stone during the day and come alive at night could be related to some form of Transfiguration magic in the Harry Potter world.
Their personalities can clash because Captain Marvel is a powerful and independent hero. She might not always want to follow Nick Fury's orders. For example, she could be more impulsive in a fight, while Fury is all about calculated moves. But they can blend as the story progresses. Maybe after a big argument where Captain Marvel's impulsive move almost gets them in trouble, she realizes Fury's wisdom. And Fury, in turn, sees her courage and determination and starts to respect her more independent style.
One great RWBY and Captain Marvel fanfiction is 'A Meeting of Heroes'. In this story, the characters from RWBY's Remnant world somehow cross paths with Captain Marvel. It has really exciting action scenes where Ruby's scythe skills are combined with Captain Marvel's photon blasts. The story does a good job of balancing the different power levels and personalities of the characters.
Fanfiction writers blend the universes by creating new storylines. They might have Naruto end up in RWBY's world due to some magical accident. Once there, he has to deal with Salem's threat. The RWBY characters are initially skeptical of Naruto but soon come to respect his abilities. The different cultures of the universes are also merged. The shinobi way of life from Naruto can be seen rubbing off on the RWBY characters, and the technology and magic of RWBY can be something new and exciting for Naruto. Salem, as a powerful antagonist, adds an extra layer of danger and mystery to the blend of these universes.
One way they blend the two is through the power systems. The chakra in Naruto and the Blade system in Xenoblade Chronicles 2 can be combined in fanfictions. Maybe a character from Naruto can somehow gain the ability to resonate with a Blade, or a Blade can be powered by chakra. This creates new and exciting storylines where the rules of both universes are bent and merged.
Writers often blend their two worlds by creating a crossover point. For instance, a magical portal could open between the wizarding world and the Naruto world. This allows Hermione to enter Sasuke's world or vice versa. They also blend the worlds by having the characters interact with each other's unique elements. So, Hermione might use her wand to perform magic in the Naruto village, while Sasuke could use his Sharingan to detect hidden magical objects in the wizarding world.
Well, Naruto's jutsu like the Rasengan could be combined with RWBY's weapon - based combat. For instance, a character might use a weapon to enhance the power or direction of the Rasengan. Also, Naruto's ability to use shadow clones could be used in team - based battles in the RWBY world, with each clone working with a different RWBY character, allowing for some really interesting strategies.