In a crossover with the Avengers, Thor would be an interesting character to pair with Madara. Thor has his godly powers and Mjolnir, while Madara has his Sharingan and immense combat skills. The clash between Thor's lightning and Madara's fire - based jutsu would be epic. Another good pairing could be with Batman. Batman's strategic mind against Madara's cunning and power would make for a great dynamic. Batman would have to rely on his gadgets and intelligence to outwit Madara.
Naruto is a great character to pair with Madara in fanfic. Their contrasting personalities and beliefs can create a lot of interesting storylines, as we've already discussed. Another good character could be Sasuke. Sasuke's own complex relationship with power and his Uchiha heritage could lead to some intense interactions with Madara.
Often, Naruto might be paired with Madara in some sense. Their opposing views on power and peace could create interesting interactions in the fanfiction.
One great 'Naruto Madara Uchiha Crossover Fanfiction' is 'The Uchiha's New Path' on FanFiction.net. It combines Madara's power with an alternate universe concept where he teams up with characters from other anime. It's really interesting to see how his skills and personality interact with new characters.
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.
In a crossover with 'Naruto', Naruto himself would be a great character to pair with Natsu. They both have strong personalities and are determined to protect their friends. They could learn from each other's fighting styles, with Naruto showing Natsu some of his ninja techniques and Natsu teaching Naruto about magic.
Link from 'The Legend of Zelda' would be an excellent character to pair with Escanor. Link is often on a quest to save his world, and Escanor's power could assist him greatly. They could also learn from each other's values. In addition, Aang from 'Avatar: The Last Airbender' could be paired with Escanor. Aang's pacifist nature and Escanor's more battle - ready attitude could lead to some character - development moments. Another character could be Geralt from 'The Witcher'. Geralt's monster - hunting skills and Escanor's raw power could make for a great team in a crossover fanfiction set in a world full of dangerous creatures.
Goku would be an obvious choice. Having father - son adventures in a crossover setting, like in a different universe or a new realm, could be really exciting. They could face challenges that require both their power levels and unique abilities. It would also be a great opportunity to explore their relationship further in a new context.
In a crossover with One Piece, Zoro would be a great character to pair with Erza. They both are highly skilled in combat, with Zoro's three - sword style and Erza's multiple weapon - based attacks. Their determination and loyalty to their friends are also similar traits, and they could engage in some epic battles together while also learning from each other's fighting cultures.
One idea could be a crossover with the Harry Potter universe. Madara Uchiha could be a powerful dark wizard from a far - off land who arrives at Hogwarts. He might be intrigued by the magic there and try to either conquer or learn from it. Another idea is a crossover with the DC universe. He could be pitted against Superman, and his Sharingan powers would make for an interesting battle against the Man of Steel. He might also form an alliance with Lex Luthor, thinking they have similar goals of power and domination.
One interesting character to pair him with could be Goku from Dragon Ball. The contrast between Madara's ninja skills and Goku's Saiyan power would make for an exciting dynamic. Another could be Harry Potter. Imagine Madara in the wizarding world, and how he would interact with Harry, who has his own set of powers and a strong sense of justice. Also, Batman would be an interesting match. Batman's strategic mind against Madara's battle - hardened tactics would be a great battle of wits.