A possible way for a DBZ and Evangelion crossover fanfiction to work is in the realm of character interactions. Consider Vegeta and Shinji. Vegeta is all about pride and power, while Shinji is often insecure. Their meeting could be a clash of personalities. Vegeta might look down on Shinji at first, but then as they face a common enemy, like an Angel from Evangelion that has some sort of connection to a DBZ villain, they start to understand each other. Also, the technology in Evangelion could be something that the Z - Fighters are interested in. For example, the entry plug system could be something they study to improve their own space travel or combat capabilities.
One plot idea could be that the Dragon Balls are accidentally brought into the Evangelion universe. This causes a stir as different factions in the Evangelion world, like NERV and SEELE, try to get their hands on them for their own purposes. Meanwhile, the Z - Fighters follow the Dragon Balls and end up in this strange new world. Another idea is that an Eva unit gains the ability to use ki, like a Saiyan. This Eva then goes rogue and starts causing chaos, and it's up to both the Evangelion pilots and the Z - Fighters to stop it.
One idea could be an Evangelion and Gundam crossover. Picture the Eva units in a battle alongside Gundam mechas against a common enemy. Another could be a crossover with Neon Genesis Evangelion and Sailor Moon. The pilots of the Evas could meet the Sailor Scouts and combine their powers to fight a new threat. And a third idea might be an Evangelion and Pokémon crossover, where the Angels are somehow related to powerful Pokémon and the Eva pilots have to use Pokémon in addition to their Evas to save the day.
Well, a really cool concept could be a villain that threatens both the Naruto and DBZ universes. So, characters from both sides have to team up to defeat this powerful foe. Imagine Vegeta and Sasuke having to work together, despite their initial differences. Also, there could be a story where the Dragon Balls are somehow transported to the Naruto world, and Naruto and his friends try to figure out what they are and how to use them.
A popular one is 'Naruto in the Dragon Ball Universe'. Here, Naruto is transported to the DBZ world. He quickly gets involved in the battles against the villains. His shadow clone jutsu is a huge advantage as it confuses the enemies. And he tries to understand the concept of ki while also teaching the DBZ characters about ninjutsu. It's a really cool mix of the two universes.
A popular 'Pokemon DBZ Crossover Fanfiction' is 'Vegeta's Pokemon Adventure'. Here, Vegeta lands in the Pokemon world and decides to take on the Pokemon League. His pride and combat skills make for an exciting read as he battles trainers. 'DBZ Warriors in the Pokemon Realm' is also good. It shows how the Z - fighters interact with Pokemon, from trying to understand the concept of Pokemon battles to using their own ki - based powers in unique ways during Pokemon battles.
A great DBZ crossover fanfiction often has well - developed characters. When DBZ characters cross over into another universe, their personalities should remain true while also adapting to the new setting. For example, if Goku is in a Naruto crossover, his love for fighting and his naivete should still be there but in a way that fits the Naruto world. Good pacing is also key. The story should move along smoothly, not be too rushed or too slow.
One great place to start looking for the best DBZ crossover fanfiction is on fanfiction.net. It has a vast collection of different crossovers involving DBZ. Another option is Archive of Our Own (AO3), which also has a lot of well - written and creative DBZ crossovers. Some crossovers that are often considered good are those with Naruto, where the different power systems and characters' personalities create interesting storylines.
One challenge is staying true to the original 'Neon Genesis Evangelion' lore. Since it has a very complex and deep world - building, any crossover has to respect that. For example, the nature of the Angels and how the Evas work are crucial elements that can't be easily changed.
First, you need to know both the Evangelion universe and the other universe you want to cross it with really well. For example, if it's a Evangelion and Star Wars crossover, study the lore, characters, and technology of both. Then, think of a plot that makes sense for the two universes to collide. It could be a shared threat or a quest that involves both sets of characters. Start with a simple outline of the beginning, middle, and end of your story.