Mamoswine

IceGroundEssence of Snow

Level-up moves 7

Lv	Move	Type	Cat	Pow	Acc	PP
100	Curse Phases 1–2 rotation A move that functions differently for GHOSTS.	Ghost	Stat	—	—	10
100	Ice Shard Phases 1–2 rotation Hurls a chunk of ice that always strikes first.	Ice	Phys	40	100	30
100	Earthquake Phases 1–2 rotation A powerful quake that hits all other POKéMON.	Ground	Phys	100	100	10
100	Rock Slide Phases 1–2 rotation Large boulders are hurled. May cause flinching.	Rock	Phys	75	90	10
100	Avalanche Phases 1–2 rotation	Ice	Phys	60	100	10
100	Stomping Tantrum Starting move (Snow starting pool, after Winter is cleared) Stomps around angrily. Stronger after a failure.	Ground	Phys	75	100	10
100	Ice Fang Starting move (Snow starting pool, after Winter is cleared) May cause flinching or leave the foe with frostbite.	Ice	Phys	65	100	15

* a legal move, just moved to level-up · ** new to this game

This game's documentation doesn't publish TM compatibility, so none is listed here.

Area	Method	Level
Minibosses — Snow only	Miniboss (three per area, drawn from the pool)	90–99, scales
Your starting team — Snow affinity	Starter pool (two drawn)	100

Miniboss: three of the pool guard each area, drawn at the start of the run. In the Snow pool. Fights in 2 phases, restoring to full HP at the phase change.
Its ability, Essence of Snow: Treats the user's actions as if Snow is active.
Innates switch on as your boss count grows: Thick Fat (Heat-and-cold protection.) — from your 2nd boss win; Ice Body (HP recovery in Hail or Snow.) — from your 4th; Earth Eater (Eats ground to heal HP.) — from your 6th.
Reward for beating it: the move Ice Shard+ (Hurls a chunk of ice that always strikes first.).
As a starting-pool Pokémon it is a separate internal species with the ability Slush Rush and no innates; the stats are the same.
Starts on your side (Snow starting pool, after Winter is cleared) knowing Stomping Tantrum and Ice Fang. Any move or ability you have earned can be equipped on it from the record menu.