Well, it could be that Ash has finally had enough of Iris's overbearing behavior. Maybe she's been bossing him around about Pokemon training methods. So, Ash decides to stand up and tell her that he has his own way of doing things and that he's been successful with it. For example, Ash might have his own unique bond with Pikachu that doesn't follow Iris's ideas.
In this fanfic, it might be that Iris is trying to take over Ash's leadership in a group adventure. Ash then stands up to her by demonstrating his leadership skills. He could show how he's led his team in battles, made smart decisions during tough situations, and kept everyone's spirits high. By doing this, he makes it clear that he's the right person to lead and that Iris should respect his position.
Most likely, Iris could be seen as the main antagonist in this fanfic. Since the title says 'ash stands up to iris', it implies that Iris is the one causing some sort of problem that Ash needs to oppose. It could be her attitude or her actions that are creating conflict.
One possible plot could be that Ash and Iris reunite after a long time apart. They discover their feelings for each other have grown deeper. They then start a life together and soon find out they are going to have a baby. The fanfiction could focus on their journey of preparing for the baby's arrival, from decorating the nursery to Ash learning how to be a great father.
A possible plot could be that Ash and Iris are exploring a new region. They are so excited about the new Pokemon they might find that they forget to take proper precautions against the sun. As a result, they get sunburn. Then, they have to find a way to heal quickly because there's a big Pokemon battle coming up that they don't want to miss.
In a fanfic about Ash and Iris betrayal, perhaps Iris could betray Ash over a powerful Pokémon they both encounter. Maybe she feels that Ash is not strong enough to handle it and decides to take it for herself, thinking it will help her on her journey to become a top Pokémon trainer.
It could be that Jasper gets into trouble with another vampire clan. Bella, being the kind - hearted and brave character she is, stands up for him. She might use her unique position in the vampire - human - werewolf triangle to negotiate or fight on Jasper's behalf. This could lead to a series of adventures where they have to face various challenges together and strengthen their relationship as a result.
Well, it could be that Sakura finally decides she's had enough of Sasuke's brooding and cold behavior. Maybe she stands up to him about his disregard for the village or his lack of communication with her. She might tell him that she's her own person and won't tolerate his dismissive attitude anymore.
Perhaps a major plot twist could be that the body swap is not accidental but part of a bigger plan by a mysterious villain. This villain could be using their body swap to gain access to something that only Ash or Iris can reach in their normal bodies. For example, there could be a special Pokémon or a powerful item. And as they try to figure out how to swap back, they also have to deal with this new threat, which adds a whole new layer of complexity to the fanfiction.
Perhaps the kiss is a result of some magical or psychic Pokémon's influence. For example, a Psychic - type Pokémon might be playing matchmaker and uses its powers to make Ash and Iris kiss. But then, when they realize what has happened, they have to decide if they actually have feelings for each other on their own, without the Pokémon's interference.
One possible plot could be that Ash gets tied up by a group of Team Rocket grunts who manage to outwit him. They tie him up to stop him from interfering with their latest evil plan to steal rare Pokémon. His Pokémon then have to work together to free him and foil the villains' scheme.
In general, Ash is often depicted as his adventurous and determined self. He might be shown as being a bit naive at times. Iris, on the other hand, is usually portrayed as strong - willed and feisty. However, it's important to note that spank fanfiction is not a typical or widely - accepted form of fanfiction and may contain elements that are not in line with the original characters' personalities in a more official sense.