Here's the team
Gyarados @ Flyinium Z
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Dance
- Waterfall
- Bounce
- Earthquake
Greninja-Ash @ Life Orb
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Water Shuriken
- Hydro Pump
- Dark Pulse
- U-turn
Mawile-Mega (F) @ Mawilite
Ability: Intimidate
EVs: 92 HP / 252 Atk / 164 Spe
Adamant Nature
- Play Rough
- Sucker Punch
- Thunder Punch
- Fire Fang
Kartana @ Leftovers
Ability: Beast Boost
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Leaf Blade
- Smart Strike
- Sacred Sword
- Substitute
Tapu Koko @ Choice Specs
Ability: Electric Surge
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Dazzling Gleam
- Volt Switch
- Hidden Power [Ice]
- Thunderbolt
Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 252 HP / 112 Def / 144 Spe
Impish Nature
- Stealth Rock
- Earthquake
- Hidden Power [Ice]
- U-turn