1 species has Shed Skin as a hidden ability, 19 as a normal one

Effect, in PokéAPI's words

“Has a 33% chance of curing any major status ailment after each turn.”

As a hidden ability

Species	Slot	Note
Rellor	Hidden

As a normal ability

Species	Slot	Note
Metapod	Normal
Kakuna	Normal
Ekans	Normal
Arbok	Normal
Dratini	Normal
Dragonair	Normal
Pupitar	Normal
Silcoon	Normal
Cascoon	Normal
Seviper	Normal
Kricketot	Normal
Burmy	Normal
Scraggy	Normal
Scrafty	Normal
Karrablast	Normal
Spewpa	Normal
Silicobra	Normal
Sandaconda	Normal
Cyclizar	Normal

Elsewhere in PokéAPI

1 more holder without a page here

Alternate forms and other species that PokéAPI lists with Shed Skin.

Sandaconda Gmax