Well, one interesting plot could be the Koopalings devising a new scheme to take over a particular kingdom. They might use their unique abilities, like Iggy's intelligence for creating elaborate traps. Another plot could involve Bowser trying to train the Koopalings to be more effective in battle, leading to some comical and action - packed training sessions.
One interesting plotline could be their adventures in a new, mysterious world. They might encounter strange creatures and have to use their unique skills to overcome challenges.
In some fanfics, there might be a plot where Bowser Jr. tries to prove himself to Bowser. He might take on a difficult task on his own, like stealing a precious jewel from a well - guarded castle. This shows his growth and determination to be a worthy heir to Bowser. And it also adds a touch of family - like relationship exploration between them.
Well, Bowser is a central character. He's the one in charge, the big brute with a thirst for power. The Koopalings are also main characters. Each of them has their own distinct personality. Wendy is the only female among them and can be quite sassy. Morton is a bit clumsy but strong. Roy is tough and aggressive. Larry is the youngest and often underestimated. All of them play important roles in the fanfic, whether it's causing trouble or following Bowser's orders.
The Koopalings are also main characters. Each of them has their own distinct personality and abilities. For example, Ludwig is known for his intelligence and musical talent in some versions, and they all play important roles in whatever schemes they cook up.
A possible plot is that Bowser and Peach are forced to team up against a common enemy. This would lead to a lot of interesting interactions as they have to put aside their differences. Bowser might be initially reluctant but then realizes that Peach is a valuable ally. They could learn from each other's strengths during this adventure.
One interesting plot could be Bowser and Luigi being forced to team up against a common, greater evil. Maybe a new, more powerful villain emerges in the Mushroom Kingdom and they have to put aside their differences to save the day. This could lead to some comical moments as they try to work together, with Bowser's rough nature clashing with Luigi's more timid one.
One interesting plot could be Bowser and Mario having to team up against a greater evil. This would flip their usual dynamic on its head and lead to some really fun character interactions.
One interesting fanfic could be about Bowser Jr. going on a solo adventure to prove himself to Bowser. He might encounter some of Mario's friends and have to use his wits to get out of tricky situations.
Another possible plotline is that Dark Bowser is actually a part of Bowser that he has been suppressing. The fanfic could explore Bowser's internal struggle as he tries to come to terms with this darker side of himself. It could also show how this affects his relationships with other characters, like Princess Peach and his minions.
One possible plot could be that Bowser discovers a magical food source that makes him gain weight uncontrollably while he tries to figure out how to reverse it.