A fanfiction could explore what would happen if Natsu from Fairy Tail learned the Kaioken technique from Goku in Dragon Ball Z. Maybe he uses it in a fight against a really strong opponent in the Fairy Tail world, but has trouble controlling the power at first, leading to some comical and intense situations.
Perhaps a magic spell in the Fairy Tail world goes wrong and creates a portal that sucks in some of the main characters from Dragon Ball Z. Vegeta, for example, would initially be angry about being in this strange new place but would soon realize that there are powerful foes and allies here. The Fairy Tail guild could hold a tournament to see who is the strongest among them and the Saiyans join in. This would lead to epic battles and also some comical moments as the two groups with very different cultures try to understand each other.
One common plot idea is a crossover where characters from Fairy Tail and Dragon Ball Super meet. For example, Natsu from Fairy Tail could team up with Goku from Dragon Ball Super to fight a powerful villain that threatens both their universes.
Well, for 'Ben 10 Dragon Ball Z fanfiction', a cool concept could be that Ben gets caught in a time - space rift that sends him to the Dragon Ball Z universe right when a new and powerful enemy is emerging. Ben has to quickly figure out how to use his Omnitrix in this new world while also trying to get back home. And perhaps some of the Dragon Ball characters are intrigued by the Omnitrix and want to study it, leading to some funny and interesting interactions.
Another interesting concept would be Shallot getting lost in a different dimension within the Dragon Ball Z universe. He would have to find his way back while encountering strange new races and powers, and along the way, he might learn some valuable lessons about himself and his abilities. This could lead to him coming back to his own world as a much stronger and wiser fighter.
Some ideas for Dragon Ball Z Gine fanfiction include a time - travel story. Gine could be brought to the present day by some time - traveling villain or device. Then she has to adapt to the new world while also using her Saiyan knowledge and skills to help the Z - fighters. Another idea is to focus on Gine's family. Write about her relationship with Bardock in more depth, or create a story about her extended family on Planet Vegeta that we haven't seen before. You could also do a story where Gine meets the other Saiyans who were resurrected, like Nappa and Raditz, and how she interacts with them.
One idea could be a fanfiction where Vegeta gets a completely new haircut as a part of a disguise during a mission on a new planet. Maybe he has to blend in with the locals who have a very unique and flamboyant hairstyle. Another could be about Goku getting his hair cut by Chi - Chi because she wants him to look more presentable for a family gathering, but then he discovers that his power level is affected in some strange way. And a third idea might be a story where Trunks experiments with different haircuts to impress a new love interest in his timeline.
A great fanfiction idea could be about the Dragon Balls being accidentally transported to the Naruto universe. This would cause chaos as various ninja clans try to get their hands on them for different reasons. Maybe Naruto himself would be the one to discover them first and he has to figure out how to use them or protect them from those with malicious intent. And of course, there could be some fun interactions between Naruto's friends and the Dragon Ball Z characters who come looking for the balls.
One great Dragon Ball Z and Fairy Tail fanfiction is 'The Saiyan in Fairy Tail'. It combines the power systems of both universes really well. The main character, a Saiyan, ends up in the Fairy Tail world and has to adapt to their magic while also showing off his Saiyan abilities. It's a really exciting read.
Another popular trope is the fish - out - of - water story. When a character from Dragon Ball Z ends up in the Fairy Tail world or vice versa, they have to adjust to the new rules, culture, and magic or ki systems. It can lead to some really funny and heartwarming moments as they learn about the new world around them. For instance, Piccolo trying to understand the concept of guilds in the Fairy Tail universe.
One great story could be 'The Fusion of Worlds' which combines the elements of both Dragon Ball Z and Fairy Tail in an exciting way. It has cool battles and interesting character interactions.