Lol, I would like Harley and Ursula to team up! That is unlikely though since she probably was a oneshot rival. The thing I keep wondering about is, why make a oneshot rival have a backstory of envieing Dawn winning the WallaceCup and then leaving her to rot in anime wasteland?
She used good pokemon, with good attacks, eventhough Pachi was able to defeat it in a contest battle. I'd like to think that Gabite would destroy Pachi in regular combat.
There's a ton of things you can build up a team using groundtypes, since that's a pretty good spread typing, the mixes ranging from rock, dragon, water, grass, psychic, poison, bug, ice, steel, fire and even flying. (I'm seriously waiting for GameFreak to conjure up a Electric/Ground type..)(or the other four missing types for that matter: Normal/Ground, Dark/Ground Fighting/Ground and Ghost/Ground)