Well, perhaps a plot where in their switched bodies, they are forced to face their worst fears. For Harry in Severus' body, it could be dealing with the Dark Mark and the memories of his past actions as a Death Eater. Severus in Harry's body might have to face Voldemort directly, as Harry is often the target, and this could lead to some really intense and unexpected magical battles and revelations.
In some 'Harry and Severus switch bodies fanfiction', a great plot could be that they start to understand each other better. Harry realizes the loneliness and the difficult choices Severus had to make all his life. Severus, on the other hand, gets to experience the warmth of friendship that Harry has. This new understanding could then lead to a change in their relationship in the original story, like Severus becoming more of a mentor figure to Harry in a different way than before.
Well, they could be in a situation where their body switch affects their Pokémon. Maybe their Pokémon don't recognize them at first. Ash's Pikachu might be confused as to why 'Ash' is acting so differently. Serena's Pokémon might also be a bit hesitant to follow the commands of 'Serena' who is actually Ash. This could lead to some comical and also heart - warming moments as they try to regain the trust of their Pokémon while also dealing with the whole body - switch situation.
Character development often comes from experiencing life from the other's perspective. Harry in Severus' body might become more empathetic towards Severus' cold exterior, realizing it was a shield for his pain. He could develop a new sense of respect for Severus' knowledge.
One idea could be that Harry, in James' body, has to deal with the Marauders' era challenges like handling Snape's enmity in a different way. He could use his knowledge of the future to prevent some of the bad blood between them. Another plot could be James, in Harry's body, trying to figure out modern Hogwarts and the new threats like Voldemort's return. He might be shocked by how much the wizarding world has changed yet still use his old - fashioned courage to face the new problems.
I think Iron Man and Hulk would be a really interesting pair. Just imagine Tony Stark's brilliant mind trapped in the Hulk's huge, rage - filled body. He would be constantly trying to find a way to control the Hulk's strength and not go on a rampage. And Hulk in Tony's body would be so confused by all the technology and might accidentally set off some of Stark's weapons.
Well, one interesting plot could be Harry seeing Severus in a new light. He realizes that Severus was actually a complex and misunderstood character. So, he decides to adopt him to give him a new start in life. Another plot might involve Severus initially being resistant to the idea of being adopted by Harry, but over time, he warms up to the concept as he sees Harry's genuine kindness.
One interesting plot could be Severus having to deal with Harry's fame at Hogwarts while trying to keep their new family relationship a secret. It adds a layer of mystery and tension.
Well, a plot might involve Hermione and Ron switching bodies. This would lead to some hilarious situations as they try to act like each other. Hermione in Ron's body might be frustrated with his lack of study habits, while Ron in Hermione's body would struggle to keep up with her intense academic schedule. This kind of body switch allows for a deeper exploration of their relationship and individual personalities.
One interesting plot development could be the confusion it causes among their friends. Harry, in Hermione's body, might struggle with her academic routines and the way she approaches studies. Meanwhile, Hermione in Harry's body has to deal with the pressure of being the 'Chosen One' and facing Voldemort. For example, when Harry tries to answer questions in class as Hermione, he might not be as quick or accurate, leading to some humorous moments. Also, Hermione in Harry's body could use her intelligence to come up with new strategies against the Dark Lord that Harry might not have thought of before.
A cool plot for this fanfiction could be that all the Avengers switch bodies randomly. This would lead to total chaos. For example, Dr. Strange in Iron Man's body might use magic in ways Tony never thought of, messing up his suit's technology. Meanwhile, Iron Man in Dr. Strange's body might try to use the Cloak of Levitation like it's a jetpack. They would have to figure out how to reverse the situation while also dealing with any threats that come their way.
There would be some humorous moments too. Harry might not be used to wearing Ginny's clothes and would fumble with the different styles. Ginny, in Harry's body, might accidentally use his more masculine way of speaking and shock her friends. Also, if they had to participate in Quidditch in each other's bodies, it would be quite a sight. Harry, in Ginny's body, would have to adjust to her style of playing, and Ginny, in Harry's body, would have to live up to his reputation on the broom.