Zygarde @ Choice Band  
Ability: Aura Break  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Thousand Arrows  
- Extreme Speed  
- Rest  
- Sleep Talk  

Mawile-Mega (M) @ Mawilite  
Ability: Intimidate  
EVs: 160 HP / 252 Atk / 96 Spe  
Adamant Nature  
- Swords Dance  / Fire Fang
- Play Rough  
- Knock Off  / Fire Fang / Swords Dance
- Sucker Punch  

Landorus-Therian @ Flyinium Z  
Ability: Intimidate  
EVs: 248 HP / 64 Atk / 52 Def / 144 Spe  
Adamant Nature  
- Stealth Rock  
- Earthquake  
- Fly  
- Hidden Power [Ice]  

Tangrowth @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
- Giga Drain  
- Sludge Bomb  
- Hidden Power [Ice]  
- Knock Off  

Tapu Koko @ Choice Scarf  
Ability: Electric Surge  
EVs: 244 SpA / 12 SpD / 252 Spe  (12 spd evs allow you to always survive Water shuriken from specs gren after Rocks damage)
Timid Nature  
- U-turn  
- Thunderbolt  
- Roost  
- Dazzling Gleam  

Tornadus-Therian @ Rocky Helmet  
Ability: Regenerator  
EVs: 248 HP / 8 Def / 252 Spe  
Timid Nature  
- Hurricane  
- U-turn  
- Focus Blast  / Heat Wave (depending on how Ferrothorn threatens you)
- Defog