(assuming all original Pokemon in the first and second rounds)
Shauntal: Cofagrigus was 2HKOed by Archeops' Acrobatics (I had to use a Flying Gem in the second round). Golurk dealt some respective damage to Haxorus, but Haxorus managed to take it down with Dragon Claw in the first round and Outrage the second. Chandelure lost to Samurott in both rounds with Surf. Jellicent was a big pain in the butt because I used Scolipede. I could've used something else, but oh well.
Grimsley: Archeops took Scrafty down with Acrobatics, Excadrill took out Liepard with Earthquake, Bisharp was KOed by Sawk's Close Combat and Krookodile was KOed by Samurott's Surf. Grimsley was easy in short.
Caitlin: OHKOed Reuniclus with Scolipede's Megahorn, 2HKOed Sigilyph with Sawk's Rock Slide (even though Sawk survived a Psychic from Sigilyph without Sturdy activating), KOed Musharna with Excadrill's Earthquake. Samurott's Megahorn nearly OHKOed Gothitelle, but I landed the KO in the next hit.
Marshall: 2HKOed Throh with Samurott's Surf (I wonder why it never used Storm Throw?), 3HKOed Sawk with Haxorus' Dragon Claw (factoring in Sturdy and the Full Restore), OHKOed Conkeldurr with Archeops' Acrobatics, OHKOed Mienshao with Sawk's Close Combat (Sawk outsped Mienshao thanks to the EV training I gave it).
Team at that time: Samurott, Sawk, Scolipede, Archeops, Excadrill, Haxorus
(yeah, I kind of narrated the battles I did)