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.
A fanfic centered around Alice and Shun could explore their relationship. Maybe they start as rivals in the Bakugan battles but gradually realize they have a lot in common. For example, they both have a strong sense of justice and a love for their Bakugan partners. As they spend more time together, they could form an unbreakable bond.
Once upon a time, Lync was a rather reserved Bakugan. He met a beautiful Bakugan named Aurora. Their eyes met during a battle tournament. Lync was immediately smitten. He started to leave little gifts for Aurora, like shiny crystals he found. Aurora was initially hesitant but soon realized Lync's true heart. They began to spend more time together, exploring the Bakugan world hand in hand, or rather, paw in paw.
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.
Perhaps there's a character who is a bit of an outcast in the Bakugan community. They have a unique way of training and battling Bakugan. And then there's a popular and highly respected Bakugan player. These two, despite their differences, start to have a connection that could develop into a love story. Their journey from being from two different worlds within the Bakugan universe to falling in love can be a central part of the story.
They could be on a quest to find a rare Bakugan that has special powers. Shun's stealth and combat skills along with Alice's strategic thinking would make them a great team.
You can try looking on fanfiction websites like Archive of Our Own or FanFiction.net. They usually have a wide variety of fanfics, including ones related to Bakugan. Just search for 'Fabia' and 'Jin' in the Bakugan section on those sites.
One common theme is friendship. Jesse's relationships with other Bakugan characters are often explored, showing how they support and grow together. Another theme could be adventure, as the Bakugan world is full of exciting places to explore.