TEAMBUILDING
Started with Breloom since it was the required mon. Now since Breloom's Speed is a little underwhelming, I thought Tailwind would be a perfect fit for him. Suicune has great synergy as it checks Fire- and Flying-types for Breloom, and of course has Tailwind. Next was a Fire-type since we all know Pastel loves those bulky FWG cores. I picked Rotom-H because it had great synergy with the other two but mainly because thebagman showed me this amazing Rotom-H spread that lives literally everything. That and it was a reliable answer to Amoonguss. I still didn't have a Mega at this point, so I decided to pick one before moving forward. In an earlier draft of this team it was Mega Metagross, but I changed it to Diancie cause my team was a little weak to sun and Dragons like Kyurem-B or Hydreigon. I decided that my next mon should be one that compliments Diancie well, and the mon I chose was Aegislash. It provides coverage for mons like Cresselia and Jirachi, as well as resists for Diancie and Breloom. Lastly, I realized that this team depended kind of heavily on Tailwind, so I decided to add another setter. The best setter for my team ended up being Togekiss, as it provided a Ground switch-in for Aegislash and Diancie, and general Follow Me support.
SET DETAILS
I'll only be explaining the non 252 sets, which is all of them except Breloom so here we go. This is Memoric's Suicune set. It lives a +2 Adamant Mega Kangaskhan Return, and outspeeds Deoxys-A in Tailwind. Rotom-H's spread was given to me by thebagman but originally made by someone else idk, but woo nelly it lives a lot of stuff. It lives an Adamant Mega Kangaskhan Double Edge, Mega Diancie's Diamond Storm, and makes Jolly Landorus-T's Rock Slide a guaranteed 3HKO. It also lives Rotom-W Hydro Pump and avoids a 2HKO from Aegislash's Shadow Ball. Yeah, I know, lord set. Even though Diancie's set isn't 252, its standard and in the SmogDex if you really wanna know what it lives. I'm not going to bother explaining it here. Next up is Aegislash, and I decide since I'm using a slightly more offensive team, I would try Substitute Aegi, since I almost always use Wide Guard. The Speed outspeeds Mega Diancie in Tailwind, ad that's all the EV's really do. Lastly, I'm using KyleCole's Tailwind Togekiss set. This bad boy survives Iron Head from Life Orb Bisharp and 252 Atk Mega Metagross 100% of the time, as well as Flash Cannon Modest Aegislash. Sitris Berry is for recovery, and since I already had Goggles on Rotom-H it seemed unnecessary.