Well, one possible plot could be that Ron discovers his superpowers accidentally. Maybe he gets exposed to some strange radiation or a magical artifact. Then he has to learn to control these powers while still dealing with his normal life, like school and his friends. Kim might be initially skeptical but then becomes his ally in using the powers for good.
In a 'Ron Stoppable Gets Superpowers' fanfiction, the plot could revolve around Ron being chosen by an ancient entity to receive superpowers. He's suddenly able to fly and has super strength. But the bad guys, like Drakken, want to steal his powers. Ron has to keep his identity a secret from most people, except for Rufus of course. He then uses his powers in creative ways to defeat the villains and save the day.
Drakken would be an obvious choice. He's always causing trouble in the original series, and if Ron has superpowers, he'd be very interested in stealing them for his own evil plans. Another could be Shego. She has her own powers and might see Ron's new powers as a threat or something she wants to take for herself.
One possibility could be that Ron, with his goofy yet endearing personality from Kim Possible, somehow gets transported into the Batman universe. Maybe he becomes an unlikely sidekick, using his clumsy charm to disarm villains in unexpected ways.
He could be a comical informant. Since he has a knack for getting into strange situations in his own show, he might have valuable, if not always reliable, information for Batman about the criminal underworld.
Maybe Ron accidentally ruins Hermione's important experiment in the wizarding lab. In the fanfiction, Hermione could get revenge by getting all their mutual friends to side with her in an argument. She could present all the facts about how Ron's carelessness has cost her time and effort, making Ron feel isolated and guilty.
Well, perhaps it could be about Ron being cursed by a dark wizard. He then starts to show fiend - like behavior, like craving for chaos and destruction. His friends initially don't recognize what's wrong with him and try to figure out how to reverse the spell.
One possible plot could be that Chase discovers a new, hidden aspect of the bionic technology they have. Maybe he accidentally activates a dormant superpower gene within his bionic system during a mission. This new power could be something like telekinesis or the ability to manipulate energy. It would then lead to him having to train to control it while also dealing with the envy or concern of his siblings in the Lab Rats team.
One popular Ron Stoppable fanfiction could be those that explore his growth as a hero outside of Kim's shadow. For example, stories where he takes on solo missions and discovers new abilities.
Comedy is also a big theme. Given Ron's goofy and relatable nature from the Kim Possible series, harem fanfictions often use his clumsy or unexpected reactions to humorous effect when interacting with the members of his harem. Like when he accidentally mixes up the names or gifts for different girls in his harem, creating hilarious misunderstandings.
One common theme is identity crisis. When Ron enters a different universe, he often has to figure out who he is in that new context. For example, in a crossover with a superhero universe, he might question his own abilities compared to the super - powered beings around him.
Well, one possible plot development could be the immediate shock and confusion for both Ron and Lavender. They might have to deal with the reactions of their friends and family, like Hermione being disappointed in Ron, and Lavender's friends being either supportive or judgmental.