1 species has Snow Cloak as a hidden ability, 10 as a normal one

Effect, in PokéAPI's words

“Increases evasion to 1.25× during hail. Protects against hail damage.”

As a hidden ability

Species	Slot	Note
Articuno	Hidden	Since Generation V

As a normal ability

Species	Slot	Note
Swinub	Normal
Piloswine	Normal
Glaceon	Normal
Mamoswine	Normal
Froslass	Normal
Vanillite	Normal
Vanillish	Normal
Cubchoo	Normal
Beartic	Normal
Cetoddle	Normal

Elsewhere in PokéAPI

4 more holders without a page here

Alternate forms and other species that PokéAPI lists with Snow Cloak.

Sandshrew Alola, Sandslash Alola, Vulpix Alola, Ninetales Alola