First, know the Bakugan universe well. Use the existing characters and their personalities. For example, if you're using Dan, keep his hot - headed yet kind - hearted nature. Then, create a believable love interest. It could be a new character or an existing one. Make their interactions natural, like starting from a shared goal in Bakugan battles.
Create interesting plotlines. You can start with a simple premise like a portal opening between the two worlds and then build on it. Incorporate elements from both Naruto and Bakugan. Maybe there's a mission to find a lost Bakugan in the Naruto world. Also, don't forget about character development. As the story progresses, the main character and the harem members should grow and change. This could be in terms of their relationships, powers, or worldviews.
To write a good Bakugan Shun x OC fanfiction, focus on the relationship development. Start with an interesting encounter, like the OC getting lost in the Bakugan arena and Shun helping out. Then, show how they interact over time. Maybe they have different goals but find common ground. Also, add some action. Since it's about Bakugan, include exciting battles where both Shun and the OC show their skills. And don't forget to describe the settings, whether it's the bustling Bakugan city or a quiet training ground.
Julie might develop by becoming more confident in her Bakugan battling skills. With Billy by her side, she could learn new strategies and become more assertive in battles. Billy, on the other hand, could develop his sense of responsibility. He might start taking more risks to protect Julie and their Bakugan.
The relationship can start with mutual curiosity. Mylene could be intrigued by Bakugan Shadow's appearance and powers, and Bakugan Shadow might be interested in Mylene's unique human qualities. Then, they could start to communicate more, perhaps through some form of telepathy or a special bond. As they face challenges together, like battles against other Bakugan or solving problems in their world, their trust in each other grows.
First, think about Wavern's character traits. Is she brave, smart, or kind? Build your story around these traits. For example, if she's brave, you can put her in a dangerous situation where she has to show her courage.
Their relationship could start with hostility. Masquerade is often a mysterious and somewhat menacing figure, and Alice might be suspicious of him. But as they interact more, especially in the context of Bakugan battles, they could gradually develop a grudging respect for each other's skills. For example, if they keep facing off against each other in battles and each time they learn something new about the other's strategies.
One idea could be that Naruto discovers the Bakugan world during one of his training journeys. He meets Alice and they team up to fight against an evil force that is trying to take over both the ninja world and the Bakugan world. Naruto's ninja skills combined with Alice's knowledge of Bakugan could make for an interesting story.