Try to hit her Emolga with anything just to do some damage, then explode that Pineco on her face! Of course, that leaves the rest of her team... and i'm pretty sure Pineco is the best pokemon to take these explosions... You took a hard challenge mate... Also, y u no have Dustox? It doesn't have a weakness to electric/rock ya know? Although that weakness to ground tho...
Yeah, try to use her tactic against her (Explode! Since Pineco has Sturdy, that acrobatics can't one shot you...) All i have to say honestly, is good luck ^^