Crobat /Flying Gem
EVs: 252 atk, 252 spd, 4 HP
Ability: Inner Focus
Most use Crobat as a wall breaker, and I’m using a set similar to smogon’s wallbreaker set, but I’ve decided to to go with Acrobatics instead of Brave Bird. Acrobatics hits really hard and is STAB, Taunt stops walls/set-up sweepers from doing their job. Roost is reliable recovery, and after Spikes damage, Super Fang reduces the enemies HP to a maximum of 44%, and a minimum of 37.5% HP, which Acrobatics can mow through easily.
Roles: Wall/Stall Breaker, Acrobatics Sweeper
EVs: 248 HP, 84 def, 176 spd
Ability: Cursed Body
I chose Froslass because of it's abilit to lay down spikes, and spinblock at the same time. Taunt stops the enemy from setting up, and also keeps the hitmonfamily from Foresight Spinning. Ice Beam is STAB, and Pain Split works really well after my spikes are stacked and my HP is down.
Roles: Spikestacker, Support, Spinblocker
EVs: 252 spatk, 252 spd, 4 HP
Hidden Power Fighting
W/Scarf Porygon-Z becomes an outstanding revenge killer/late-game sweeper, as it has the speed to make quick work of most opponents with it's great spatk stat. Tri-Attack is STAB, and hits really hard w/Adaptability boost. Dark Pulse hits ghost types such as Froslass and Dusclops, while HP Fighting hits rock and steel types that resist T-Attack and D-pulse. Trick alllows him to cripple walls ans set-up sweepers.
Roles: Revenge Sweeper
EVs: 252 atk, 20 spdef, 236 spd
Ability: Solid Rock
For my Physical Sweeper I needed something that could hit hard, and Rhyperior is not only the size of an Abrams, he hits like one to. Rock Polish gets his Speed up to useable levels, and Stone Edge and Earthquake give him a formidable STAB EdgeQuake combo, and to top it off, Megahorn taks care of grass types.
Roles: Physical set-up sweeper
EVs: 252 HP, 252 def, 4 spatk
Hidden Power Ice
I had to dip in to RU to produce my physical tank, but he is so bulky, I don' think it matters that he is from a lower tier. Giga Drain + Leech Seed + Leftovers + Regenerator give him recovery out the wazoo, and HP Ice allows ihm to take down opposing grass types, as well as ambush Flygon. Sleep Powder is really annoying, and allows him to set up Leech Seed, which is can inflict such frustration to the point of ragequitting. Hidden Power Ice Screws with other grass types, as well as hitting Flygon.
Roles: Tank, Staller
EVs: 252 HP, 252 spdef, 4 spatk
I needed something to sponge specal attacks, and Empoleon seemed to fit right in. Stealth Rock is just because, Scald is STAB, and has a nice burn chance. Ice Beam hits Flygon and all that jazz, while Roar is for Phazing, which works really well after SR and full Spikes.
Roles: Special Tank, Phazer, Rock-Setter