Rain is Pain

Uxie @ Light Clay
Trait: Levitate
EVs: 252 HP / 4 Def / 252 Spd
Timid Nature (+Spd, -Atk)
- Light Screen
- Reflect
- Memento
- Stealth Rock

Azumarill (M) @ Choice Band
Trait: Huge Power
EVs: 252 HP / 252 Atk / 4 Def
Adamant Nature (+Atk, -SAtk)
- Ice Punch
- Waterfall
- Superpower
- Aqua Jet

Porygon-Z @ Silk Scarf
Trait: Adaptability
EVs: 4 Def / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Agility
- Tri Attack
- Dark Pulse
- Nasty Plot

Bronzong @ Damp Rock
Trait: Levitate
EVs: 188 HP / 68 Def / 252 SDef
Sassy Nature (+SDef, -Spd)
- Toxic
- Gyro Ball
- Rain Dance
- Stealth Rock

Rotom-C @ Damp Rock
Trait: Levitate
EVs: 252 HP / 252 SAtk / 4 SDef
Modest Nature (+SAtk, -Atk)
- Toxic
- Rain Dance
- Leaf Storm
- Volt Switch

Omastar (M) @ White Herb
Trait: Swift Swim
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Surf
- Ice Beam
- Hidden Power [Grass]
- Shell Smash