A crossover with a superhero universe, say the Marvel universe, would also be exciting. Picture Natsu teaming up with the likes of Iron Man or Thor. Natsu's fiery nature might clash or blend well with the high - tech and super - powered heroes. He could help fight against villains like Thanos, using his unique brand of magic.
One interesting concept could be Natsu's enhanced power levels. In end form, he might have new and more powerful fire-based attacks. For example, he could create a massive inferno that not only burns but also has some kind of special effect like nullifying dark magic in the fanfiction world. Another concept could be his appearance. Maybe he has a more mature and fierce look, with his hair changing color slightly or his eyes glowing more intensely. Also, his relationships with other characters might be developed further. His bond with Lucy could become even stronger, and they could have new adventures together where his end form is crucial for their success.
One interesting concept could be exploring Natsu's new powers and abilities in the Dragon Force state in more depth. Maybe he discovers hidden techniques or ways to control the power better.
In Sasuke crossover Fairy Tail fanfiction, a cool concept is the idea of Sasuke learning Fairy Tail magic. Maybe he could learn a type of fire magic and combine it with his own chakra-based attacks. This would not only give him new powers but also lead to some interesting battles against powerful foes in the Fairy Tail universe. Also, the relationships he could form with the Fairy Tail guild members, such as a friendship or rivalry with Gray, would be exciting to explore.
One idea could be Natsu crossing over into a modern-day world. He'd be confused by all the technology but use his magic in unexpected ways, like using fire magic to power up electrical devices. Another could be a crossover with a different anime world where Natsu has to team up with new characters to fight a common enemy. For example, in a world full of mecha, he might use his fire to overheat the enemy mechas.
In 'fairy tail gamer fanfic', a fascinating concept is the use of game interfaces. Characters might have a HUD (Heads - Up Display) that shows their health, mana, and other stats. This not only gives a more immersive gaming feel but also can create interesting scenarios. For example, a character might be in a tough battle and have to quickly check their mana levels to decide whether to use a powerful spell or not. It can also lead to strategic decision - making within the story, similar to how one would play a real - time strategy game.
A crossover with 'Naruto' could also be cool. Imagine the Fairy Tail guild members in the Hidden Leaf Village. They could participate in the Chunin Exams, and their magic would be a new type of jutsu. There could be battles between Fairy Tail mages and ninja, like Natsu vs Sasuke, which would be an epic showdown of fire - based powers.
The different worlds colliding is also a great concept. The world of 'Fairy Tail' which is full of guilds, battles, and a medieval - like setting, and the colorful, pony - filled world of 'MLP'. When these two worlds meet in the fanfic, it can lead to all sorts of cultural exchanges. For instance, the ponies might be introduced to the concept of guilds and how they function in 'Fairy Tail'.
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.
A great idea for this crossover fanfic would be to focus on the friendship aspect. Both DBZ and Fairy Tail have strong themes of friendship and loyalty. You could have Goku and Natsu become friends and learn from each other. Goku could teach Natsu about self - improvement through training, while Natsu could show Goku the importance of having a guild family. Their combined efforts could be used to defeat a powerful villain that threatens both their worlds, like a new kind of fusion between a DBZ villain and a dark guild master.
Goku from Dragon Ball Z could be a great crossover character for Natsu. They are both very strong and have a love for fighting. Goku's ki - based attacks and Natsu's fire magic would make for some epic battles. They could also train together and learn from each other's fighting styles. Also, Alucard from Hellsing could be an interesting crossover. His vampiric powers against Natsu's magic would create a very dark and intense story.