I wanted this team to be an offensive team with Zard X and Ash-ninja as my primary wincons. I like both of those mons and enjoy their offensive synergy and ability to take care of each other’s checks. I've peaked at 1476. (Don't have a pic, sorry)
Primordus (Charizard-Mega-X) @ Charizardite X
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
Flare Blitz
Dragon Claw
Earthquake
Dragon Dance
This is your basic Jolly ZardX. I chose EQ over roost for the added bonus of dealing with Heatran and Electric types. The only major problems I have with it are Lando-T w/ Rocky Helmet and Scarf Keldeo.
Sheik (Greninja-Ash) @ Choice Specs
Ability: Battle Bond
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
Hydro Pump
Ice Beam
Dark Pulse
Water Shuriken
Again, more of a cookie-cutter set, but instead of U-Turn, I use Ice Beam to deal with Tangrowth switch-ins and Garchomp.
252 SpA Choice Specs Greninja-Ash Ice Beam vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 240-284 (59.4 - 70.2%) -- guaranteed 2HKO
Specs Greninja-Ash Ice Beam vs. 248 HP / 48 SpD Tangrowth: 530-624 (131.5 - 154.8%) -- guaranteed OHKO
Kudzu (Tapu Bulu) @ Choice Band
Ability: Grassy Surge
EVs: 84 HP / 252 Atk / 172 Spe
Adamant Nature
Horn Leech
Zen Headbut
Stone Edge
Superpower
From the other two, I saw I had a weakness to bulky waters. Best solution was to complete the FWG core with something that could pack a strong grassy punch without sacrificing coverage. What better for that than Band Adamant Bulu? I thought about including Mega Horn, but stone edge has proven more reliable due to mons weak to Megahorn usually switch out into something fiery.
I have Zen Headbut for Mega Venusaur switch-ins.
Terra (Landorus-Therian) @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 216 Def / 28 SpD / 16 Spe
Impish Nature
Earthquake
U-Turn
Hidden Power Ice
Stealth Rock
Now I needed a rocks setter, so I chose the best of the best: Lando-T. It provides a ground immunity for Zard X and slow U-turn for safe switching. I chose HP Ice over Knock Off or Stone Edge for opposing Landorus-Ts, which I would otherwise have a problem with. The 28 SpD guarantees a 2HKO from Life Orb Tapu Koko HP Ice.
252 SpA Life Orb Tapu Koko Hidden Power Ice vs. 248 HP / 28 SpD Landorus-Therian: 322-380 (84.5 - 99.7%) -- guaranteed 2HKO
0 Atk Landorus-Therian Earthquake vs. 0 HP / 0 Def Tapu Koko in Electric Terrain: 338-402 (120.2 - 143%) -- guaranteed OHKO
Titania (Tapu Fini) @ Leftovers
Ability: Misty Surge
EVs: 252 HP / 160 Def / 96 SpD
Calm Nature
Hydro Pump
Nature’s Madness
Taunt
Defog
Wait, I'm using Zard; I need a spinner or a defogger. I looked at my available options and decided against Skarmory and Starmie due to a general special weakness and a water sweeper already present. This monster can take most hits easily and then half the health of switch ins with NM. Taunt is for Toxapex and Ferrothorn switch ins and Smeargle leads.
Mordrem (Nihilego) @ Choice Scarf
Ability: Beast Boost
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
Thunderbolt
Sludge Wave
Power Gem
Psychic
Now I had an extreme weakness to poison damage, so I wanted a steel type. I tried Scarf Magnezone, Chople Berry Magnezone, then Sash Magnezone. I really wanted Magnezone, however I just couldn't get past how slow it is. I asked around in OU chat and Competitive tutoring and many people suggested Scarf Nihilego. My only concern is it really suffers from 4 moves syndrome. Since I have Ice Beam and HP Ice elsewhere, and I have a slight (large) problem with Mega Venusaur, I chose Psychic.
As stated, I have a large problem overall breaking Mega Venusaur based stall, and Scarf Keldeo if Fini is down.
Primordus (Charizard-Mega-X) @ Charizardite X
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
Flare Blitz
Dragon Claw
Earthquake
Dragon Dance
This is your basic Jolly ZardX. I chose EQ over roost for the added bonus of dealing with Heatran and Electric types. The only major problems I have with it are Lando-T w/ Rocky Helmet and Scarf Keldeo.
Sheik (Greninja-Ash) @ Choice Specs
Ability: Battle Bond
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
Hydro Pump
Ice Beam
Dark Pulse
Water Shuriken
Again, more of a cookie-cutter set, but instead of U-Turn, I use Ice Beam to deal with Tangrowth switch-ins and Garchomp.
252 SpA Choice Specs Greninja-Ash Ice Beam vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 240-284 (59.4 - 70.2%) -- guaranteed 2HKO
Specs Greninja-Ash Ice Beam vs. 248 HP / 48 SpD Tangrowth: 530-624 (131.5 - 154.8%) -- guaranteed OHKO
Kudzu (Tapu Bulu) @ Choice Band
Ability: Grassy Surge
EVs: 84 HP / 252 Atk / 172 Spe
Adamant Nature
Horn Leech
Zen Headbut
Stone Edge
Superpower
From the other two, I saw I had a weakness to bulky waters. Best solution was to complete the FWG core with something that could pack a strong grassy punch without sacrificing coverage. What better for that than Band Adamant Bulu? I thought about including Mega Horn, but stone edge has proven more reliable due to mons weak to Megahorn usually switch out into something fiery.
I have Zen Headbut for Mega Venusaur switch-ins.
Terra (Landorus-Therian) @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 216 Def / 28 SpD / 16 Spe
Impish Nature
Earthquake
U-Turn
Hidden Power Ice
Stealth Rock
Now I needed a rocks setter, so I chose the best of the best: Lando-T. It provides a ground immunity for Zard X and slow U-turn for safe switching. I chose HP Ice over Knock Off or Stone Edge for opposing Landorus-Ts, which I would otherwise have a problem with. The 28 SpD guarantees a 2HKO from Life Orb Tapu Koko HP Ice.
252 SpA Life Orb Tapu Koko Hidden Power Ice vs. 248 HP / 28 SpD Landorus-Therian: 322-380 (84.5 - 99.7%) -- guaranteed 2HKO
0 Atk Landorus-Therian Earthquake vs. 0 HP / 0 Def Tapu Koko in Electric Terrain: 338-402 (120.2 - 143%) -- guaranteed OHKO
Titania (Tapu Fini) @ Leftovers
Ability: Misty Surge
EVs: 252 HP / 160 Def / 96 SpD
Calm Nature
Hydro Pump
Nature’s Madness
Taunt
Defog
Wait, I'm using Zard; I need a spinner or a defogger. I looked at my available options and decided against Skarmory and Starmie due to a general special weakness and a water sweeper already present. This monster can take most hits easily and then half the health of switch ins with NM. Taunt is for Toxapex and Ferrothorn switch ins and Smeargle leads.
Mordrem (Nihilego) @ Choice Scarf
Ability: Beast Boost
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
Thunderbolt
Sludge Wave
Power Gem
Psychic
Now I had an extreme weakness to poison damage, so I wanted a steel type. I tried Scarf Magnezone, Chople Berry Magnezone, then Sash Magnezone. I really wanted Magnezone, however I just couldn't get past how slow it is. I asked around in OU chat and Competitive tutoring and many people suggested Scarf Nihilego. My only concern is it really suffers from 4 moves syndrome. Since I have Ice Beam and HP Ice elsewhere, and I have a slight (large) problem with Mega Venusaur, I chose Psychic.
As stated, I have a large problem overall breaking Mega Venusaur based stall, and Scarf Keldeo if Fini is down.