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.
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.
Yes, there are. Some might feature characters from Dragon Ball Z and Fairy Tail teaming up to fight a common enemy. For example, Goku and Natsu could join forces. Their different powers, like Goku's Saiyan abilities and Natsu's dragon slayer magic, would create really exciting battle scenes.
One possible plot could be that the Fairy Tail guild discovers a strange energy similar to the ki in the DBZ universe. Natsu, being the curious and powerful wizard he is, decides to investigate. He then somehow gets transported to the DBZ world. There, he meets Goku, who is intrigued by Natsu's magic. Together, they have to face a new enemy that is a threat to both their worlds. This enemy could be a powerful wizard who has found a way to combine dark magic with the power of the dragon balls.
One idea could be that Naruto and his friends are transported to the Fairy Tail world. They could join forces with Natsu and the gang to fight a common enemy, like a powerful dark wizard who has the ability to control the Nine - Tailed Fox. Another plot could involve the sharing of magic and ninja techniques between the two groups. For example, Naruto teaching some Fairy Tail members basic ninja moves while they teach him some magic spells.
Another plot could involve a villain that is a threat to both worlds. The Fairy Tail wizards and the MLP ponies would have to team up to defeat this common enemy. Maybe the villain is stealing magic from both worlds to become all - powerful. The ponies with their unique abilities and the wizards with their powerful spells would combine their forces in an epic battle.
Goku and Natsu would be an interesting pairing. Goku's pure - heartedness and love for fighting would mesh well with Natsu's fiery and passionate nature. They could have some epic battles together just for fun, and then team up to take on stronger foes. Another good pairing could be Vegeta and Gray. Vegeta's prideful and somewhat cold demeanor would contrast with Gray's cool - headedness. They could learn from each other's fighting styles, with Vegeta showing Gray some of his Saiyan techniques and Gray teaching Vegeta about his ice - make magic.
Well, you could write a 'a fairy'a tail fanfic' about a time - travel adventure. Maybe the characters go back in time to prevent a great disaster that was hinted at in the original series. Or perhaps a story where the Fairy Tail guild has to team up with their arch - enemies to face a common, much greater threat. And a simple but interesting idea could be a day - in - the - life story of one of the guild members, showing their normal routine as well as some unexpected events.
You could write a 'Fairy Tail Fanfic' where the magic system is completely different. For example, instead of having different types of elemental and non - elemental magic, there's only one type of magic but different levels of mastery. Or a fanfic that focuses on the relationships between the guild members in a romantic aspect. Like a love triangle between Gray, Juvia, and a new character.
Another plot could be that a magic spell in Fairy Tail goes wrong and transports some of the Fairy Tail members to the One Piece world. They end up on an island and have to figure out how to get back home. They meet Luffy and his crew, and they start to exchange skills. The Fairy Tail mages teach the pirates some basic magic, while the pirates show the mages their unique fighting styles. They then team up to take on a powerful pirate who has been terrorizing the island and also has some sort of dark magic ability.
A cool concept would be to combine the magic systems. So, the Soul Reapers' Kidou could be related to Fairy Tail magic in some way. For example, a Soul Reaper could teach some of the Fairy Tail mages how to use Kidou for a special mission against a common enemy that has the ability to disrupt both the Soul Society and the Fairy Tail world.