ORAS Rain Down/Strikedown

Tornadus-Therian @ Assault Vest
Ability: Regenerator
EVs: 76 HP / 216 SpA / 216 Spe
Timid Nature
- Hurricane
- Focus Blast
- Knock Off
- U-turn

Politoed @ Damp Rock
Ability: Drizzle
EVs: 252 HP / 78 Def / 4 SpA / 174 SpD
Calm Nature
IVs: 0 Atk
- Encore
- Scald
- Protect
- Perish Song

Swampert @ Swampertite
Ability: Torrent
EVs: 98 HP / 252 Atk / 158 Spe
Adamant Nature
- Waterfall
- Earthquake
- Ice Punch
- Superpower

Ferrothorn @ Shed Shell
Ability: Iron Barbs
EVs: 220 HP / 168 Def / 120 SpD
Relaxed Nature
IVs: 0 Spe
- Gyro Ball
- Stealth Rock
- Leech Seed
- Protect

Mew @ Leftovers
Ability: Synchronize
EVs: 252 HP / 152 Def / 104 Spe
Impish Nature
IVs: 0 Atk
- Defog
- Soft-Boiled
- Will-O-Wisp
- Heal Bell

Keldeo @ Choice Specs
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Hydro Pump
- Scald
- Secret Sword
- Icy Wind