Medicham @ Medichamite
Ability: Telepathy
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Fake Out
- High Jump Kick
- Ice Punch
- Zen Headbutt

Greninja @ Choice Specs
Ability: Battle Bond
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Hydro Pump
- Dark Pulse
- Spikes
- Water Shuriken

Tapu Koko @ Choice Scarf
Ability: Electric Surge
EVs: 4 Atk / 252 SpA / 252 Spe
Timid Nature
- Thunderbolt
- U-turn
- Dazzling Gleam
- Volt Switch

Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 252 HP / 216 Def / 40 Spe
Impish Nature
- Stealth Rock
- Earthquake
- U-turn
- Hidden Power [Ice]

Magearna @ Assault Vest
Ability: Soul-Heart
EVs: 248 HP / 8 SpA / 252 SpD
Sassy Nature
IVs: 22 Spe
- Iron Head
- Fleur Cannon
- Hidden Power [Fire]
- Volt Switch

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Zygarde @ Dragonium Z
Ability: Aura Break
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Dragon Dance
- Thousand Arrows
- Extreme Speed
- Outrage

or 

Manaphy @ Waterium Z  
Ability: Hydration  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Tail Glow  
- Surf  
- Rain Dance  
- Rest