From Bulbanews, your community Pokémon newspaper.
To be available starting February 1
Alolan Vulpix and items associated with Ice will be distributed for Pokémon Sun and Moon at Pokémon Centers and Pokémon Stores in Japan from Feb. 1, 2016 to March 12, 2017.
This Vulpix is the same as the Alolan Vulpix currently being distributed at the Pokémon Center Sapporo, so players cannot obtain it again if they have already obtained it there. This Vulpix is level 10, has the Ability Snow Cloak, and knows the moves Celebrate, Tail Whip, Baby-Doll Eyes and Ice Shard. For further details, see its entry on Bulbapedia.
To coincide with the Vulpix distribution, a different ice-related item will be distributed each day of the week. The items are Ice Heal, Ice Stone, Icy Rock, Never-Melt Ice, Aspear Berry, Casteliacone, and Snowball. Only one item can be obtained per day.