A Tale of Two Cousins is a Harry Potter canon divergence fanfic. In this story, Dudley Dursley is Boy Who Lived, and raised by James and Lily. The fic can be found here.
This verse provides examples of:
- Death by Adaptation: Vernon and Petunia are murdered by Voldemort.
- Decomposite Character: With Dudley being the Boy Who Lived, the scar appears on Dudley rather than Harry.
- For Want Of A Nail: Peter giving Voldemort the wrong address results in Dudley becoming Boy Who Lived.
- As a result of this, Sirius Black never goes to Azkaban.
- In Spite of a Nail: Harry still gets sorted into Gryffindor.
- Killed Mid-Sentence: Vernon gets hit with a nonverbal Killing Curse while saying "There's no such thing as mag-."
- Literary Allusion Title: The title is a reference to A Tale of Two Cities.
- Secret-Keeper: The point of divergence from canon is that James decides on Sirius as secret keeper rather than Peter.