Abomasnow @ Life Orb
Ability: Snow Warning
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Blizzard
- Giga Drain
- Earthquake
- Ice Shard
Sandslash-Alola @ Icium Z
Ability: Slush Rush
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Icicle Crash
- Earthquake
- Iron Head
Regirock @ Leftovers
Ability: Clear Body
EVs: 252 HP / 180 Def / 76 SpD
Impish Nature
- Stealth Rock
- Stone Edge
- Drain Punch
- Toxic
Skuntank @ Rocky Helmet
Ability: Aftermath
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Defog
- Pursuit
- Sucker Punch
- Poison Jab
Jellicent @ Choice Specs
Ability: Water Absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Water Spout
- Hydro Pump
- Shadow Ball
- Ice Beam
Dodrio @ Choice Scarf
Ability: Early Bird
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- Jump Kick
- Return
- Knock Off
Ability: Snow Warning
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Blizzard
- Giga Drain
- Earthquake
- Ice Shard
Sandslash-Alola @ Icium Z
Ability: Slush Rush
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Icicle Crash
- Earthquake
- Iron Head
Regirock @ Leftovers
Ability: Clear Body
EVs: 252 HP / 180 Def / 76 SpD
Impish Nature
- Stealth Rock
- Stone Edge
- Drain Punch
- Toxic
Skuntank @ Rocky Helmet
Ability: Aftermath
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Defog
- Pursuit
- Sucker Punch
- Poison Jab
Jellicent @ Choice Specs
Ability: Water Absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Water Spout
- Hydro Pump
- Shadow Ball
- Ice Beam
Dodrio @ Choice Scarf
Ability: Early Bird
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- Jump Kick
- Return
- Knock Off
This is meant to be a simple hail team that uses Abomasnow and Offensive A-Sandslash to tear through teams.
Abomasnow: On top of being the weather setter for this team, Abomasnow acts as a mixed wallbreaker. Ice Shard helps revenge low health targets, with Blizzard and Giga Drain stab to break walls (Giga Drain also being used to help increase Abomasnow's staying power.) EQ is there as coverage and as a strong physical attack.
Alolan-Sandslash: The Hail abuser and primary set up sweeper for this team, with Swords Dance. Duel Stab from Icicle Crash and Iron Head allow Sandslash to hit many pokemon in PU for neutral damage... with EQ coverage to deal with pokemon Steel + Ice cannot. Icium Z is used to OHKO pokemon that a Hail boosted Icicle Crash would otherwise fail to.
Regirock: Regirock is a physically bulky rock setter who fits well into this team thanks to him checking many pokemon that would threaten the Abomasnow\Sandslash core. Stone Edge is stab... with Drain Punch over EQ so that Regirock can stay on the field for longer (and with Ground type coverage already being taken care of). Toxic is there to help chip away at bulkier mons and help Abomasnow and Jellicent break teams.
Skuntank: Skunktank is the defogger for this team, using Rocky Helmet with Aftermath to help check physical attackers. Pursuit helps keep offensive pressure on the psychic and ghost types in the tier with Sucker Punch priority and Poison jab to fill out the set (allowing Skuntank to hit Fairies and potential poison something coming in).
Jellicent: Jellicent uses Choice Specs to help break alongside Abomasnow. Water Spout tears through teams (with Hydro Pump for when Jellicent gets low) and Shadow Ball + Ice Beam allows Jellicent to hit a vast majority of the meta game. Ice Beam also benefits from Hail is up.
Dodrio: Options for a Choice Scarfer were a bit limited for this team... but I decided on Scarf Dodrio to help deal with the Fighting Types that give hail teams some trouble. Dodrio, being on the faster pokemon in PU, can outspeed and revenge kill most threats with Brave Bird, Return and Jump Kick. Knock off helps support the team by removing key items from the enemy team's mons.