"Anything B possible for this Possible!"
In Bonnie Possible, an upcoming AU fic by micknutson9, Bonneville "Bonnie" Possible is an alternate universe version of Bonnie Rockwaller.
One of several children born to James Possible and the woman in canon who was known as Mrs Rockwaller, Bonnie's mother, whom James married instead of Ann.
Summary
Nature vs Nurture. What difference will it make in the life of one of Middleton's best-known cheerleaders when born into a different family dynamic?
Difference from Canon
James Possible never married Ann. Instead, he married Candy and they had several children, the youngest of which is Bonnie.
A natural blonde with light slate gray eyes, Bonnie become a freelance hero for hire after a pedophile rapist serial killer posing as a photographer used her website advertising her services as a preteen "youth model" to lure her to a remote location supposedly for a modeling session intending to make her his latest victim. Capitalizing on the distraction provided by the panicked actions of her friend and next door neighbor, Ronnie Stoppable, Bonnie was able to gain the upper hand, knock out the perv, and call the police. She was able to collect on a couple sizeable rewards.
The resulting media-glut about the "Hero Cheerleader" lead to a large number of hits on her site asking for her help, many with rewards offered which she prioritized.
Since then, Bonnie's business gradually grew into bounty hunting, skip tracing, and private investigations. On occasions even helping Officer Hobble. At the insistence of their parents that Bonnie, often with Ronnie in tow, needed someone older to accompany her, older sister Longevité "Lonnie" Possible has since been her chaperone, driver, and main sidekick.
Captain of the Middleton Senior High School cheer squad, she runs a lucrative bounty hunter business through her website.