(OU) Does this just win?

Serperior @ Miracle Seed
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk / 30 SpA / 30 Spe
- Leaf Storm
- Dragon Pulse
- Hidden Power [Fire]
- Giga Drain

Hawlucha @ Sitrus Berry
Ability: Unburden
EVs: 252 Atk / 16 Def / 240 Spe
Jolly Nature
IVs: 30 HP
- Swords Dance
- Substitute
- High Jump Kick
- Acrobatics

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 160 Def / 96 SpD
Sassy Nature
IVs: 24 Spe
- Moonblast
- Calm Mind
- Soft-Boiled
- Thunder Wave

Talonflame @ Leftovers
Ability: Gale Wings
EVs: 248 HP / 8 Atk / 252 SpD
Careful Nature
- Swords Dance
- Will-O-Wisp
- Brave Bird
- Roost

Starmie @ Leftovers
Ability: Natural Cure
EVs: 240 HP / 16 Def / 252 Spe
Timid Nature
- Psyshock
- Scald
- Rapid Spin
- Recover

Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 144 Def / 112 SpD
Impish Nature
- Stealth Rock
- Earthquake
- Toxic
- Slack Off