Dawn's family might be a bit hesitant at first. They know Ash is always on the move for Pokémon battles and adventures. But when they see how much Ash loves Dawn and is willing to settle down, they would come around. Ash's family, on the other hand, would be very enthusiastic. His friends from Pallet Town could come to help with the wedding arrangements and bring their own Pokémon to add to the celebration.
Ash's father, if he is introduced in the fanfiction, could be very supportive. He might give Ash some advice on being a good husband. Dawn's family could also be very involved in the wedding preparations. Her grandmother might pass down a family heirloom for Dawn to wear on her wedding day, symbolizing the family's acceptance and celebration of the union with Ash.
On Ash's side, his mom would be extremely happy and would start planning the wedding immediately. She would love Dawn like her own daughter. Ash's other friends like Tracey would send their best wishes. For Dawn's family, they would see Ash as a great match for Dawn. Her mother would be glad that Dawn has found someone who shares her love for Pokemon. Her father would be impressed with Ash's achievements in the Pokemon world and would wholeheartedly approve of the marriage.
One common theme is adventure. Since they are both Pokémon trainers, their married life often involves going on new Pokémon - catching adventures. Another theme is family. They might think about starting a family and raising Pokémon - loving kids.
Archive of Our Own (AO3) is another great place. It has a well - organized tagging system. So, if you search for 'Ash married Dawn' along with other relevant Pokémon tags, you should be able to find some interesting fanfictions. The community there also provides good feedback on the quality of the stories.
Midoriya's family would be ecstatic. His mother would be busy helping with the wedding preparations, giving advice on everything from the dress to the food. Uraraka's family would be equally happy. They would see Midoriya as a kind - hearted and strong young man. Her mother would likely bond with Midoriya's mother over the wedding plans, and the two families would come together to celebrate the union of the two young heroes.
Elena's friends and family might be a bit wary at first. After all, Elijah is from a different world. Her aunt Jenna might be concerned about the implications of this marriage for Elena's future. However, her friends like Bonnie and Caroline could come around once they see how much Elijah loves Elena. For Elijah's family, some might be happy to see him find love, while others, who are more traditional or power - hungry, might see Elena as an outsider and try to break them up.
The Uzumaki family might be a bit shocked at first. But Naruto's kind - hearted nature could make them eventually come around. His mother Kushina might be more accepting as she always wanted Naruto to be happy. As for Sasuke's family, well, it's a bit more complicated. Since Sasuke is the last of the Uchiha, his family's traditional values might be a hurdle. However, if Sasuke is determined, he might be able to convince any remaining family members or those who care about the Uchiha legacy that his relationship with Naruto is a positive thing.
Lucas's family might be overjoyed. They could see Maya as a wonderful addition to the family. His parents might start planning big family dinners and vacations together right away. His siblings could be excited to have a new sister - like figure in the family.
Ron's family might be initially shocked. His parents, who know Shego was once a villain, would be worried about Ron's safety. But they could come around if they see how much Shego has changed and how happy Ron is. His friends might also be skeptical at first but gradually accept it.
The reaction of their families could be quite diverse. Natsu doesn't really have a traditional family, but his friends in Fairy Tail are like family. They would be excited and probably throw a huge party. Cana's father, Gildarts, has been absent for a while. But when he hears the news, he might feel a mix of emotions. He could be happy that Cana has found love, but also a bit sad that he hasn't been around more. However, overall, the Fairy Tail guild would embrace their union and make them feel special and loved.
The Weasley family's reaction would be intense. Fred and George might make jokes about it at first, but deep down they'd be concerned. Ginny's older brothers would be protective and think Draco isn't good enough for her. The Malfoy family would also be in turmoil. Draco's grandparents, if they were still alive, would probably be appalled. However, Draco and Ginny's love could gradually change the minds of some family members. For example, Draco could show the Weasleys that he has changed for the better, and Ginny could make the Malfoys see that she is a strong and worthy addition to their family.