Learnt by Level Up

These Pokémon learn Shadow Sneak at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Spinarak	19	bug poison
Ariados	19	bug poison
Shedinja	38	bug ghost
Sableye	25	dark ghost
Kecleon	20	normal
Shuppet	20	ghost
Banette	20	ghost
Duskull	22	ghost
Dusclops	22	ghost
Spiritomb	1	ghost dark
Dusknoir	22	ghost
Giratina Altered	19	ghost dragon
Greninja	23	water dark
Honedge	20	steel ghost
Doublade	20	steel ghost
Aegislash Shield	1	steel ghost
Pumpkaboo Average	30	ghost grass
Gourgeist Average	30	ghost grass
Rowlet	12	grass flying
Dartrix	12	grass flying
Decidueye	1	grass ghost
Mimikyu Disguised	14	ghost fairy
Marshadow	1	fighting ghost
Iron Valiant	1	fairy fighting
Giratina Origin	19	ghost dragon
Aegislash Blade	1	steel ghost
Pumpkaboo Small	30	ghost grass
Pumpkaboo Large	30	ghost grass
Pumpkaboo Super	30	ghost grass
Gourgeist Small	30	ghost grass
Gourgeist Large	30	ghost grass
Gourgeist Super	30	ghost grass
Banette Mega	16	ghost
Sableye Mega	16	dark ghost
Greninja Battle Bond	23	water dark
Greninja Ash	23	water dark
Mimikyu Busted	14	ghost fairy
Mimikyu Totem Disguised	14	ghost fairy
Mimikyu Totem Busted	14	ghost fairy
Zorua Hisui	12	normal ghost
Zoroark Hisui	12	normal ghost
Decidueye Hisui	12	grass fighting

Learnt through Breeding (Egg Moves)

These Pokémon learn Shadow Sneak through Breeding (Egg Moves) at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Grimer	0	poison
Misdreavus	0	ghost
Ralts	0	psychic fairy
Ceruledge	0	fire ghost
Bramblin	0	grass ghost
Greavard	0	ghost
Grimer Alola	0	poison dark