Pelipper's Ravaging Thunder Storm V. 1.0

Pelipper @ Damp Rock
Ability: Drizzle
EVs: 248 HP / 36 Def / 224 SpD
Bold Nature
- Scald
- Defog
- Roost
- U-turn

Swampert-Mega (M) @ Swampertite
Ability: Torrent
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Waterfall
- Earthquake
- Ice Punch
- Substitute

Tornadus-Therian @ Metronome
Ability: Regenerator
EVs: 248 HP / 8 SpA / 252 Spe
Timid Nature
- Hurricane
- Knock Off
- U-turn
- Taunt

Ferrothorn (M) @ Leftovers
Ability: Iron Barbs
EVs: 248 HP / 24 Def / 236 SpD
Careful Nature
- Stealth Rock
- Power Whip
- Protect
- Leech Seed

Tapu Koko @ Shuca Berry
Ability: Electric Surge
EVs: 32 HP / 88 Def / 172 SpA / 216 Spe
Timid Nature
IVs: 0 Atk
- Thunder
- Hidden Power [Ice]
- Volt Switch
- Roost

Magearna @ Fightinium Z
Ability: Soul-Heart
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Shift Gear
- Fleur Cannon
- Focus Blast
- Thunderbolt