Fanfiction about 'waluigi x rosalina' might focus on the development of their relationship over time. Maybe it starts with a chance encounter. Waluigi, being his devious self, initially approaches Rosalina with some sort of self - serving plan. But as time passes, he starts to develop real feelings for her. Rosalina, on the other hand, is initially cautious but gradually warms up to him as she discovers his hidden depths. The fanfiction could also introduce other characters from the Mario franchise reacting to this relationship, adding more drama and humor to the story.
A 'waluigi x rosalina fanfiction' could be about exploring an unexpected relationship between the two characters. It might involve how their different personalities interact. For example, Waluigi is often portrayed as a bit of a mischievous character, while Rosalina has a more serene and maternal quality. In the fanfiction, the writer could create scenarios where Waluigi tries to impress Rosalina in his own clumsy way, or Rosalina helps Waluigi to become a better version of himself. It could also be set in different locations within the Mario universe, like on Rosalina's Comet Observatory or in one of the many kingdoms that Waluigi has visited during his adventures.