Well, a great concept for a Naruto Monster Hunter crossover fanfiction would be to have the monsters from Monster Hunter invade the Naruto world. The ninja villages would then have to adapt their fighting styles to deal with these new and powerful foes. Hinata could use her Byakugan to detect the approaching monsters from a distance. And Rock Lee could try to take on the monsters with his taijutsu, showing off his amazing speed and strength. Also, the Monster Hunter guild could send some of their best hunters to help the Naruto characters, leading to some interesting interactions between the two groups.
One idea could be that Naruto characters are transported to the Monster Hunter world. For example, Naruto himself could use his shadow clone jutsu to hunt down large monsters. It would be really cool to see Sasuke using his Sharingan to analyze the monsters' weak points. Another idea is to have the Monster Hunter weapons and armors be integrated into the Naruto universe. Maybe some ninja could start using the powerful long swords or bows from Monster Hunter in their battles.
A great Monster Hunter World crossover fanfiction idea is a crossover with Pokémon. Imagine the hunters in the Pokémon world, using their skills to catch Pokémon in a more 'hunting' style rather than the traditional Pokémon-catching method. They could also use Pokémon as companions in their monster hunts in the Monster Hunter World. Another interesting one could be a crossover with God of War. Kratos could join the hunters in their quests, bringing his brute strength and combat skills to the table.
Maybe the monsters from the Monster Hunter world start appearing in Remnant, the RWBY world. The RWBY teams then have to adapt their fighting styles to take on these new and powerful foes. They might study Monster Hunter strategies to gain an edge.
One idea could be that Naruto and Gon meet during a strange interdimensional rift. They initially misunderstand each other but soon realize they have a common goal of protecting their friends and worlds. Another could be that the Akatsuki and the Phantom Troupe somehow cross paths and form an uneasy alliance to achieve their own ends, which involves stealing powerful artifacts from both Naruto's world and the Hunter x Hunter world. And a third idea might be that Naruto and Killua swap places for a short time, experiencing the different power systems and cultures of each other's worlds.
One idea could be a crossover with Naruto. Gon and Naruto could team up and learn from each other's unique ninja and hunter skills. They might compete in a friendly way to see who's stronger in different aspects like physical strength or strategy.
One idea could be to have the hunters from Monster Hunter enter the world of Dragon Age. They could encounter the different races like elves and dwarves, and perhaps help them in their fight against darkspawn. The hunters' skills in taking down large and dangerous monsters could be a great asset in the battles of Dragon Age.
One idea could be a story where Pokemon trainers are recruited to participate in a Monster Hunter style quest. They have to use their Pokemon's skills in a new and dangerous environment filled with the large and menacing monsters from Monster Hunter. For example, a Charizard could use its fire breath not just to battle other Pokemon but to fend off a Rathalos. Another idea is a crossover where a particular Pokemon has some sort of connection to a Monster Hunter creature, like Pikachu being able to communicate with a Felyne and they team up to solve a mystery in both their worlds.
A plot could revolve around a monster girl who is trying to prove herself in the world of Monster Hunter. She befriends a human hunter, and together they face various challenges in the wild, like uncovering ancient secrets that are tied to both monster and human history. This could involve exploring forgotten ruins and deciphering old texts.
Another possibility is a crossover with the Percy Jackson series. Since both deal with different mythologies, the Shadow Hunters and the demigods could meet. They could exchange knowledge about their respective mythologies and perhaps work together to defeat a new kind of monster that is emerging due to a mix of their two worlds' magic.
One idea could be to have the Fairy Tail mages team up with Monster Hunter characters to take on a powerful and mysterious new monster that is causing chaos in both worlds. They could combine their magic and hunting skills in unique ways.
In a 'Hunter x Hunter crossover RWBY fanfiction', it could be that the Nen abilities in Hunter x Hunter are seen as a form of magic in the RWBY world. Some of the RWBY characters are fascinated by this new power source and want to learn about it. So, they make a deal with the Hunters to exchange knowledge about their respective powers. This leads to some really interesting training sessions and battles where they combine Nen and Semblance powers.