I've always hated both co-ordinators because they both, compared to Misty, had the personality of a stale brick of cheese.
"Ooh, they struggled though!" isn't a good enough excuse, either. That's the writers attempting to put depth into their shallow characters.
The only redeeming thing either of them have are their looks, because fanboys can drool over them.
I've only ever liked the co-ordinators for their teams; I like Dawn's Ambipom and Mamoswine, that's it.
And then there's Piplup. Whether in English or Japanese, its voice makes my ears bleed, it's brattiness makes me want to punch it in the (boobs), and it inexplicably outperforms all of Dawn's and even some of Ash's Pokemon in certain instances. (How does a Bubblebeam send Team Rocket blasting off? ...Never mind, there have been Razor Leaves that have done that, so I'm not going to get started on that...)
The fact that it thinks it's so effing special pisses me off. I wish the two of them would take a hike. :|