Maybe in the fanfiction, Gladion is from a noble family in the Pokemon world. His family has certain expectations for his wedding. He, however, chooses to marry someone who is not from a noble background. There could be a lot of drama with his family trying to stop the wedding at first. But in the end, they see how much he loves his partner and give their blessing.
One popular storyline is Gladion and Moon teaming up to face a new, powerful and mysterious Pokemon threat that even the Alola region's strongest trainers are struggling with. They have to combine their unique skills and Pokemon to overcome it.
In such a fanfiction, one possible scenario could be that Gladion gets involved in a battle against a powerful and malicious Pokemon trainer. The trainer's Pokemon might use a super - powerful attack that Gladion's Pokemon can't withstand, and in an attempt to protect his Pokemon, Gladion gets caught in the crossfire and is killed. Another scenario could be that he stumbles upon a dangerous, secret organization within the Pokemon world that doesn't want their secrets exposed. They might target Gladion and assassinate him to keep him silent.
Lillie would be a great addition. She's Gladion's sister and could play an important role in the wedding preparations or give a heart - warming speech at the wedding. Another character could be Ash. He could be Gladion's best man, since they've had their fair share of adventures together. His Pikachu could also add some fun moments to the story.
One interesting Gladion Pokemon fanfiction could be about his journey to train a rare and powerful Pokemon. Maybe he discovers a Pokemon with unique abilities that no one has seen before. He then has to figure out how to train it and overcome the challenges that come with such a powerful and unknown creature.
In a more complex story, there could be a curse placed on Pikachu by an ancient Pokemon spirit. This curse gradually weakens Pikachu over time. As it gets sicker, Ash tries everything he can to find a cure. But in the end, Pikachu's body gives out. Ash is left to deal with the grief, and he embarks on a journey to find a way to break the curse and bring Pikachu back.
Perhaps Ashley betrays Ash by revealing his battle strategies to other trainers. In the Pokemon world, strategies are crucial, and this could lead to Ash losing battles. As a result, Ash might feel extremely disappointed and have to come up with new strategies while also dealing with the betrayal.
Another idea could be that Dawn gets a haircut that has a special meaning in a certain Pokemon culture. For example, she visits a new region where a particular haircut is a sign of respect for a powerful Pokemon deity. She decides to get that haircut to show her respect and in doing so, she gains the favor of the local Pokemon trainers and their Pokemon. They start to share their training secrets with her because they see her as someone who respects their traditions.
One possible scenario could be that all their Pokémon friends are part of the wedding. Pikachu might be the ring - bearer, with little ribbons on its ears. Another scenario is that they have the wedding on a beach near a Pokémon Center. Ash could be wearing a traditional tuxedo, and Misty in a beautiful white dress with a water - type Pokémon motif.
One possible storyline could be that Viola and Grant team up for a special Pokemon photography exhibition. Viola, with her skills in photography and knowledge of bug - type Pokemon, and Grant, who has a deep understanding of rock - type Pokemon, decide to create a unique collection that showcases the beauty and power of different Pokemon types. They travel across the Pokemon world, facing challenges like bad weather and wild Pokemon attacks while trying to get the perfect shots.
One possible storyline could be that Ash is a knight in training and Serena is a noble lady. Ash has to prove his worth in a jousting tournament to win Serena's hand in marriage. Another could be that they are both on a quest to find a magical Pokemon that is said to have the power to save the medieval kingdom from an evil sorcerer. And a third could be that Serena is a healer and Ash is a warrior, and they team up to fight off a horde of dark - type Pokemon that are attacking the villages.