I hate her. Her incompetence is really annoying. She always needs ten year olds to do her job for her. Also, I don't think it's appropriate to wear makeup when you're an officer. It reminds me of how my German teacher complained about cop dramas in America looking fake because everyone's wearing makeup. Anyway, let's list a few of Officer Jenny's crimes (Yes, I'm treating them all as one character).
She's constantly giving Ash and friends crime-related information they have no need to know (and probably shouldn't know).
She's constantly getting assistance from ten year olds and sometimes she actively seeks it. In Black and White, in the Dragonite episode, she sought out the champion, prompting Ash and friends to aid her. When their aid didn't suffice, she rounded up a whole team of trainers to do her job for her.
In XY, a group of Malamar controlled her mind as part of an evil scheme
Seriously, has she ever done anything right? Do the writers make her look incompetent on purpose?