Pure, undiluted VoltTurn

Beedrill-Mega @ Beedrillite
Ability: Sniper
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- U-turn
- Poison Jab
- Knock Off
- Drill Run

Tapu Koko @ Magnet
Ability: Electric Surge
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Thunderbolt
- U-turn
- Hidden Power [Ice]
- Taunt

Victini @ Choice Band
Ability: Victory Star
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- V-create
- U-turn
- Bolt Strike
- Brick Break

Landorus-Therian @ Rocky Helmet
Ability: Intimidate
EVs: 252 HP / 216 Def / 24 SpD / 16 Spe
Impish Nature
- Earthquake
- Stealth Rock
- Hidden Power [Ice]
- U-turn

Zapdos @ Leftovers
Ability: Pressure
EVs: 248 HP / 244 SpD / 16 Spe
Calm Nature
IVs: 0 Atk
- Volt Switch
- Defog
- Roost
- Heat Wave

Greninja @ Choice Specs
Ability: Torrent
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- U-turn
- Water Shuriken
- Dark Pulse
- Hydro Pump