One interesting plot point could be how they handle their different Pokémon - training styles. Ash is more impulsive and befriends Pokémon easily, while Clair is more traditional. Their marriage could be a journey of learning from each other in that aspect. Another could be dealing with family reactions. Ash has his mom and friends, and Clair has her family in the Dragon's Den. How they all react to the marriage and blend their families could be really engaging.
One plot idea could be that Clair challenges Ash to a special battle where the loser has to fulfill a strange request. For example, if Ash loses, he has to help Clair train a particularly stubborn Dragon - type Pokémon for a month. Another idea is that they team up to explore an ancient, mysterious cave filled with rare Pokémon and hidden secrets about the Pokémon world. Maybe they discover an old prophecy that involves them and their Pokémon.
Another interesting plot point could be the combination of abilities. Imagine Naruto using his shadow clone jutsu and Clair's Pokemon using moves like Double Team. They could create some really complex and cool battle strategies. Also, if there are bad guys involved, like Team Rocket from Pokemon and the Akatsuki from Naruto, they could team up to cause more chaos, and our heroes would have to figure out how to stop them. This would involve Clair using her knowledge of Pokemon types and Naruto using his ninja wisdom.
One interesting story could be about Ash and Clair teaming up to face a powerful and rare Pokemon. They might have to combine their skills and knowledge to overcome it.
I'm not sure about specific 'ash and clair married fanfiction' offhand. But you could try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide variety of fanfictions, and you can use the search function to look for stories specifically about Ash and Clair getting married.
In a fanfiction, perhaps Clair betrays Ash because she believes he's not a worthy trainer. She might think that Ash's methods are too haphazard and that he's endangering the Pokemon world. So, she teams up with an organization that wants to control the Pokemon trainers, leaving Ash feeling abandoned and betrayed. This could lead to Ash having to prove himself even more to the Pokemon community and also having to face Clair in a big showdown later on.
Another plot point might be the relationships the reincarnated OC forms. They could have a different dynamic with Ash's friends like Brock and Misty. The OC might introduce new ideas or ways of thinking to the group, which could lead to some really fun and unexpected adventures.
In a fanfiction about their wedding, a plot point could be a mix - up with the wedding dresses. Jessie ordered a specific one but gets a completely different design. She has to decide whether to go with it or try to find the original in a very short time. Another interesting aspect could be the bachelor and bachelorette parties. Maybe something crazy happens at Luke's bachelor party that makes Jessie a bit worried at first, but then she realizes it was all in good fun. And there could be a moment during the ceremony where the officiant forgets the words, leading to a humorous and heartwarming moment.
One plot point could be Bulma getting pregnant again and Vegeta being overly protective. He might not let her out of his sight, which leads to some comical situations as Bulma is used to her independence.
One common plot point is how they deal with their different backgrounds. Since Haruhi is from a more ordinary family and Tamaki is from a wealthy and somewhat eccentric one, their married life could involve a lot of cultural clashes and adjustments. For example, Tamaki might introduce Haruhi to his family's elaborate traditions, which she has to adapt to.
One interesting plot point could be how they deal with their different leadership styles. Zuko is used to a more authoritarian style, while Toph is more of a lead - by - example type. They might have to find a middle ground when it comes to making decisions for their family or community. Another could be the discovery of a new bending technique that combines fire and earth bending, which they explore together.