This species reached its zenith during the period known as the ice age. I suspect that Hisui's frigid climate is in harmony with Mamoswine's constitution, thus awakening hidden potential.
Hidden Ability
The Pokémon is oblivious, keeping it from being infatuated, falling for taunts, or being affected by Intimidate.
Boosts the Pokémon's evasiveness in snow.
The Pokémon is protected by a layer of thick fat, which halves the damage taken from Fire- and Ice-type moves.
