Fleeing a volcanic eruption, it settled on a snowy mountain. As it races through the snowfields, it sends up a spray of snow.
– Pokémon Sun Pokédex
Alolan Sandslash is Ice/Steel type, which is a type combination unique to its family. It’s not the greatest type defensively, being 4x weak to Fire and Fighting. Despite being no longer Ground type, its name is still Sandslash. Its spikes are made of Steel covered in Ice, according to its Moon Pokedex, and it can give severe frostbite on top of deep wounds.
It evolves from Sandshrew via Ice Stone rather than by level. Because of this, it doesn’t learn many moves by level-up. It does learn some pretty good physical Ice moves such as Icicle Crash and Icicle Spear; both moves are learned only by a handful of Pokemon. In terms of Steel moves, it learns Metal Claw by level-up, though it can get Iron Head as a Sandshrew.
Despite being Ice type, it can learn Sunny Day by TM. As weird as that is though, it’s not the only Ice type that can; Articuno, Sneasel, Weavile, Glaceon, and Crabominable can also earn it.
Stat-wise, it has good Defense and Attack, but low other stats. Compared to Kanto Sandshrew, it trades 20 Sp Attack for 10 in each of its defenses. It’s not a bad trade, considering its Sp Attack is already low to begin with. It only has 65 Speed, but its Hidden ability, Slush Rush, doubles its Speed in Hail. Slush Rush is unique to Alolan Sandshrew family; it’s basically the Hail version of Sand Rush/Swift Swim/Chlorophyll. I find it odd that it took them until gen 7 to add it.