First, decide which two universes you want to cross over. For example, if it's My Little Pony and a superhero universe, figure out how the elements of each world can interact. Then, start with a simple idea for a plot, like a pony getting superpowers. Just start writing down your ideas and don't worry too much about grammar at first.
First, you should be familiar with the MLP world. Watch the shows, read other fanfics, and get to know the characters, their personalities, and the overall lore. Then, come up with an interesting idea. It could be a new adventure for the ponies or a different take on an existing event. For example, what if Pinkie Pie lost her ability to make parties fun? Next, start writing a simple outline of your story, including the beginning, middle, and end.
First, come up with a unique plot. For example, you could have the cupcakes be magic and cause strange things to happen to the ponies who eat them. Then, focus on the characters' personalities. If you're writing about Pinkie Pie, make sure she's bouncy and fun.
First, you need to have a clear story in mind. Decide on the plot, the characters you want to include, and the overall theme. For example, if you want a friendship - themed story like in the original MLP FIM.
First, you need to have a clear idea. Think about what aspect of the MLP world you want to focus on. It could be a particular character, a new adventure in Equestria, or a different take on an existing event. For example, if you love Rainbow Dash, you could create a story about her secret training regime.
First, you need to be really familiar with the MLP FIM universe. Know the characters, their personalities, and the world they live in. Then, think about how you want to apply Rule 63. Decide which characters you'll gender - flip and how that will change their relationships and storylines.
First, you need to have a clear idea of the story you want to tell. Decide on the cause of Ember's inflation. Is it a magical spell gone wrong? Or some strange new phenomenon in Ember's dragon realm? Then, think about how Ember will respond emotionally. Will she be embarrassed, or will she take it in stride?
First, come up with an interesting premise for the revolution. It could be something like a new threat to Equestria that the current system can't handle. Then, create your main characters. They could be existing ponies from the show with new personalities or entirely new ponies. Start writing down your ideas for the plot, like how the revolution will start and what the goals are.
First, familiarize yourself with the MLP universe and its characters. Know their personalities and abilities. Then, think about the wrestling aspect. Decide on the rules of your wrestling matches in the fanfic.
First, come up with an interesting concept for your cyborg character. Decide what kind of pony it was before becoming a cyborg and what led to its transformation. For example, it could be a pegasus who was injured in a storm and rebuilt as a cyborg to fly again.
First, you need to familiarize yourself with both the My Little Pony and Hellsing universes. Know the characters, their personalities, and the rules of their respective worlds. For example, in MLP, the ponies have different types of magic and a harmonious society, while in Hellsing, there are vampires and a secret organization fighting them.