VGC 2017 - Mr.Saints' Groundium Z Sandslash-Alola

I laddered to 1,693 on Pokémon Sun and Moon's VGC 2017 Battle Spot

Most of this data was extracted directly from a replay. The battle was against an Italian player named Mr.Saints, who was at roughly 1,774 at the time of our battle. Ninetales, Sandslash, Muk, and Gyarados are Mr.Saints' Pokémon, and while he brought Tapu Koko and Marowak as well- I couldn't extract that data since they weren't brought to the battle. So I'm using my own as placeholders.

Groundium Z Sandslash can OHKO Marowak (and mostly anything weak to Ground)

Funnily enough this Sandslash's EV spread was the same as my own right before it. In Hail, its 112 speed (224 after Slush Rush) would be 1 point higher than a Jolly max speed Pheramosa. When I think about everything that can realistically KO Sandslash though, it makes me wonder if the slight bump in bulk was worth it. I have never had to worry about being outsped yet, but I can't help but think, "what if" sometimes.

Ninetales-Alola @ Life Orb
Ability: Snow Warning
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Blizzard
- Freeze-Dry
- Aurora Veil
- Protect

Sandslash-Alola @ Groundium Z
Ability: Slush Rush
Level: 50
EVs: 44 HP / 252 Atk / 212 Spe
Adamant Nature
- Icicle Crash
- Iron Head
- Earthquake
- Protect

Muk-Alola @ Assault Vest
Ability: Power of Alchemy
Level: 50
EVs: 164 HP / 252 Atk / 92 Spe
Adamant Nature
- Gunk Shot
- Knock Off
- Explosion
- Shadow Sneak

Gyarados @ Sitrus Berry
Ability: Intimidate
Level: 50
EVs: 76 HP / 252 Atk / 180 Spe
Jolly Nature
- Waterfall
- Earthquake
- Dragon Dance
- Protect

Tapu Koko @ Focus Sash
Ability: Electric Surge
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Discharge
- Dazzling Gleam
- Taunt
- Protect

Marowak-Alola @ Thick Club
Ability: Lightning Rod
Level: 50
EVs: 252 HP / 180 Atk / 6 Def / 26 SpD / 44 Spe
Adamant Nature
- Flare Blitz
- Shadow Bone
- Bonemerang
- Protect