As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Vanillite:
Did you know? Unable to survive in hot areas, it makes itself comfortable by breathing out air cold enough to cause snow. It burrows into the snow to sleep. Supposedly, this Pokémon was born from an icicle. It spews out freezing air at −58 degrees Fahrenheit to make itself more comfortable.
Source: @Pokemon
Source:Pokémon