WOOHOO! Beat the Super Triples Chatelaine on my second try! (I had a bad loss around 15 my first try where I got OHKO haxed) Triples are sooo much more fun than singles. Here's the team I used:
Abomasnow@Abomasite
Snow Warning
Quiet, 252 HP/6 Atk/252 SpA
-Blizzard
-Protect
-Wood Hammer
-Focus Blast
The king of this team. Spamming perfect blizzards and having so many weaknesses that the AI flocks to attack him, he really was the glue that held this team together. I got a lot of freeze hax that made a lot of battles not as close as they should have been. I used wood hammer to finish off the odd water type, but I almost always used protect on the first turn, followed by blizzard spam. Would mega on the second turn sometimes if I thought the AI was going to use a weather move.
Azumarill@Splash Plate
Huge Power
Adamant, 252 HP/252 Atk/6 Spe
-Waterfall
-Aqua Jet
-Play Rough
-Superpower
My left slot. Kept the pressure off of Abomasnow by using waterfall/aqua jet on problem fire types. Play rough helps to deal with bulky waters more reliably, and Superpower hit the steels that would give Abomasnow problems.
Aromatisse@Safety Goggles
Aroma Veil
Sassy, 252 HP/6 Def/252 SpD
-Moonblast
-Trick Room
-Protect
-Wish
Wow, this thing is one of my new favorite pokemon. It was an incredibly reliable trick room setter, only failing maybe twice through the whole 50 battles (due to fake out or confusion). After trick room was up, Moonblast spam was surprisingly effective. It hits surprisingly well coming off of Aromatisse's above-average special attack. Wish and Protect may as well have been filler. I used them a few times but they almost never meant anything. Safety Goggles over leftovers because I should ALWAYS have damaging weather up, and leftovers don't protect from powder moves (even though I never encountered any).
Reuniclus@Life Orb
Magic Guard
Bold, 252 HP/252 Def/6 SpA
-Psyshock
-Trick Room
-Focus Blast
-Shadow Ball
Backup room setter and substitute if one of my sides fainted. Not a lot to explain, because it mostly dealt with poison types that weren't part ground. I used Focus Blast on this guy more than on Abomasnow. I don't think he ever actually set Trick Room, but I sure felt better having him around.
Tyranitar@Assault Vest
Sand Stream
Sassy, 252 HP/6 Atk/252 SpD
-Rock Slide
-Earthquake
-Payback
-Fire Blast
Surprise! Double weather! If Abomasnow fainted (or had too many fire types or water types to deal with), in came this guy. Had his own plethora of weaknesses, but since I was already running two fairies and a psychic type, the major fighting type weakness was covered. Soaked up attacks and dealt the damage back while my sides tore through the rest. Was absolutely invaluable.
Salamence@Choice Specs
Intimidate
Naive, 6 HP/252 SpA/252 Spe
-Dragon Pulse
-Draco Meteor
-Hydro Pump
-Fire Blast
The closer. If I ever didn't get trick room set up (and had something die) or had trick room expire, this guy stepped up to the plate. Dragon Pulse was the attack of choice over Draco Meteor since I could hit things across the field. Fire Blast came in handy a couple times against steels.
So there you are! It was a lot of fun using a different Mega than I've seen a lot of people use :) Here are two battles for you guys: the first is against a veteran that gave me a scare, and the second is against the Chatelaine (in case anyone needs to do more research on her team).
J9CW-WWWW-WWW3-2GLN
TL6W-WWWW-WWW3-2GMW