RWBY characters would likely adapt in different ways. Weiss, being from a more refined background, might study the Pokemon world meticulously. She could read up on Pokemon types and their strengths and weaknesses, and then apply her knowledge to build a strong team. Blake, with her stealthy nature, could use her skills to observe Pokemon in the wild and learn their behaviors, which would help her in training and battles. Yang, with her strength, could bond with physically powerful Pokemon and learn to control their power in battles through her own experience of handling her own strength.
One interesting concept could be the fusion of Pokemon and RWBY characters' abilities. For example, a character from RWBY might gain the power to use a Pokemon's move. Another could be the exploration of different regions from Pokemon in the RWBY universe, like how the Sun and Moon regions would look and function there. Also, the idea of RWBY characters becoming Pokemon trainers and having their own unique teams is quite exciting.
Characters can adapt to the body swap by first trying to understand the new physical abilities and limitations. For example, if a human swaps with a flying - type Pokemon, they need to learn how to control flight. They also need to communicate differently. If a Pokemon is in a human's body, it might use simple gestures or sounds at first to convey its needs. Another way is to observe the behavior of the original owner of the body. By watching how others interact with the body they now inhabit, they can learn how to act appropriately.
Naruto would probably be very excited about the Pokemon world. He would be eager to catch as many Pokemon as he could and would quickly make friends with other trainers. His adventurous spirit would lead him to explore all the different regions in search of strong Pokemon.
Well, the characters' adaptation to having Pokemon around is a complex process. Initially, they may be in awe of the presence of these magical creatures. But soon they realize the responsibilities. They have to educate themselves about different Pokemon species. They might also have to deal with the economic impact. For example, if a person has a rare Pokemon, they could potentially make money from it through exhibitions or competitions. As time goes on, they become more confident in handling their Pokemon and see them as friends and partners in this new world.
Naruto characters would first need to understand the concept of Pokemon. They could start by learning how to capture and train them. Since Naruto characters are used to combat, they might quickly pick up on battle strategies with Pokemon. For example, Sasuke with his natural combat skills could be a great Pokemon trainer. They would also have to adapt to the different regions in the Pokemon world, which are like different landscapes compared to their own hidden villages.
Ruby would probably be very curious at first. Her adaptable nature would help her start learning about the apes' ways quickly. Weiss might have some trouble due to her more refined upbringing, but she could use her intelligence to find common ground. Blake, with her experience of being an outcast, could potentially understand the apes' struggle for their own place in the world better. Yang would likely be ready to fight if the situation called for it, but also try to find peaceful solutions.
In some fanfictions, Lillie is often portrayed as a more delicate and reserved character. Moon, on the other hand, is seen as the bolder one. For example, when they enter a new area full of unknown Pokemon, Moon might be the first to approach and try to interact, while Lillie hangs back a bit.
Madara would have to adapt to the different threats in RWBY, mainly the Grimm. In his world, he was used to fighting other shinobi and clans. The Grimm are a whole new type of enemy. However, his Sharingan would give him an advantage in detecting their movements. He might also try to find a way to use the Grimm's negative energy, similar to how he used negative emotions in his own world to fuel his power.
The main trainer is a common character, of course. Also, popular Pokemon like Pikachu, Rowlet, and Litten often appear. They might be part of the 'harem' around the trainer. And sometimes, the Alolan regional forms of Pokemon, such as Alolan Vulpix, could also be included.
Lillie is often a popular character. Her kind nature and her growth throughout the story can be really interesting to explore in fanfiction.