Well, that was much easier than I was expecting. I had a couple scares, but I made it through on my first try. The team!
Klefki@Light Clay
Prankster/Bold
252 HP/252 Def/6 Spe
-Light Screen
-Reflect
-Safeguard
-Foul Play
The same screener you've seen other people use. Sent it out first to absorb Intimidates. Got one KO the entire time.
Talonflame@Sky Plate
Gale Wings/Adamant
126 HP/252 Atk/132 Spe
-Brave Bird
-Flare Blitz
-Roost
-Tailwind
The glue of the team. I had never actually used any form of Talonflame before, and Tailwind support works wonderfully in Rotation battles since you don't need to waste the turn switching. Also, you know, Brave Bird hits really, really hard.
Heracross@Heracronite
Guts->Skill Link/Adamant
214 HP/252 Atk/44 Spe
-Close Combat
-Bulk Up
-Pin Missile
-Rock Blast
Mega-cross! It was kind of sub par compared to Abomasnow and Mawile, but with so much bulk (and leeway provided by Klefki's screens), this guy fit perfectly in between by other two members. 44 Speed EVs meant that he reached 101 speed, outrunning un-boosted base 130s after Tailwind. The bulk was absolutely incredible, which really helped with the random swaps the AI liked to do. I used Bulk Up when the AI was dumb, and he usually got three kills during his three kills of Tailwind.
Hydreigon@Life Orb
Levitate/Mild
6 HP/252 SpA/252 Spe
-Earthquake
-Dark Pulse
-Draco Meteor
-Roost
Special Attacker. Was great filler, hit hard when I needed it to, and appreciated Tailwind support. Mostly used Dark Pulse, and was only used sparingly. Also, not getting hit by spikes/toxic spikes was nice.
Video of #50: BL2G-WWWW-WWW3-54QH
Next up: New Mega, and double battles!