Begin with a strong hook. It could be a situation that immediately throws the characters from both universes together in an unexpected way. For example, if it's a crossover with 'My Hero Academia', start with Ciel and Sebastian suddenly appearing in the middle of a villain attack at UA High School. This will draw the readers in and make them want to read more.
Start with creating your characters. Even if you're using the existing characters from Kuroshitsuji, you might want to add some new traits or backstories to them. For example, if you're writing about Grell Sutcliff, you could give him a different motivation for his actions. After that, plan out your plot. Think about the beginning, middle, and end of your story. Make sure there are some interesting twists and turns to keep the readers engaged.
First, you need to have a good understanding of the Kuroshitsuji universe. Know the characters, their personalities, and the rules of the world like the existence of demons and reapers. Then, come up with an interesting concept. It could be a new adventure for Ciel and Sebastian, or a what - if scenario like what if Ciel never made the contract with Sebastian. After that, create an outline of your story, including the beginning, middle, and end.
To start a Kakuzu crossover fanfiction, you need to have a clear goal for the story. If it's a crossover with the DC universe, you could start with Kakuzu arriving in Gotham City. He might start causing chaos as he tries to amass wealth in this new, unfamiliar place. Think about how the existing characters in the DC universe, like Batman, would react to him. Build on these interactions, adding in elements of Kakuzu's backstory and motives to create a complex and engaging narrative.
First, you need to have a good understanding of the Asura lore. Know their culture, powers, and how they interact in their own universe. Then, choose the other universe you want to crossover with. Research that universe thoroughly as well. After that, think of an interesting plot point that could bring these two universes together. For example, a mysterious portal that connects the Asura world to the other.
First, decide which universe or character you want to cross Beerus with. This is crucial as it sets the tone and direction of your story. For example, if it's a crossover with the Naruto universe, think about how Beerus' powers would interact with ninjutsu. Then, create an interesting starting point. It could be Beerus accidentally landing in the Naruto world due to some sort of space - time rift.
You should also plan out the plot. Decide on a central conflict. It could be something like a common enemy that both sets of characters have to face. Maybe in a crossover with 'Zootopia', there's a villain who wants to disrupt both the human - like world of the descendants and the animal - centered Zootopia. Then, start writing an engaging introduction that hooks the reader right away.
Think about the themes you want to explore. In an Ultraman and Sailor Moon crossover, you might explore themes of heroism and friendship. You can start by writing a scene that shows the contrast between Ultraman's more serious, alien - fighting nature and Sailor Moon's more magical, girl - power approach. This contrast can drive the story forward and create interesting interactions between the characters.
First, choose the two universes you want to cross over. For example, if you pick Wizard101 and Narnia, research both well. Know the characters, settings, and magic systems of each. Then, think of a plot that brings the two together. It could be as simple as a portal opening between the two worlds.
Begin by brainstorming the setting. If it's a crossover with a fantasy world like Middle - earth, figure out how Mechagodzilla fits in. Will it be a mechanical monstrosity that the hobbits and elves are terrified of at first? Outline your story structure. Start with an interesting hook, like Mechagodzilla crashing into Middle - earth. Then build the conflict and resolution.
First, decide which other universe or story you want to cross Alita with. Then, think about how Alita's character traits, like her strength and determination, will interact with the new setting. You can start by writing a short scene that shows her arriving in the new world.