Extrasensory is learned by 43 species by level and 15 by egg

Effect, in PokéAPI's words

“Has a chance to make the target flinch.”

Who learns it

54 species in all, 8 of 18 games shown

Scarlet and Violet: 32 species

Species	Method	Level
Exeggutor	Level up	1
Hoothoot	Level up	21
Chimecho	Level up	22
Noctowl	Level up	23
Reshiram	Level up	24
Vulpix	Level up	28
Bronzor	Level up	28
Bronzong	Level up	28
Rabsca	Level up	29
Uxie	Level up	35
Mesprit	Level up	35
Azelf	Level up	35
Lugia	Level up	36
Ho-Oh	Level up	36
Exeggcute	Level up	40
Nuzleaf	Level up	43
Tornadus	Level up	45
Landorus	Level up	45
Enamorus	Level up	45
Raikou	Level up	48
Entei	Level up	48
Suicune	Level up	48
Greninja	Level up	49
Cyndaquil	Egg
Quilava	Egg
Typhlosion	Egg
Stantler	Egg
Shiftry	Egg
Spoink	Egg
Zorua	Egg
Oranguru	Egg
Indeedee	Egg

Legends Arceus: 25 species

Species	Method	Level
Misdreavus	Level up	25
Chimecho	Level up	25
Mismagius	Level up	25
Chingling	Level up	25
Spiritomb	Level up	25
Uxie	Level up	27
Mesprit	Level up	27
Azelf	Level up	27
Vulpix	Level up	29
Ninetales	Level up	29
Stantler	Level up	29
Drifloon	Level up	29
Drifblim	Level up	29
Wyrdeer	Level up	29
Tornadus	Level up	31
Thundurus	Level up	31
Landorus	Level up	31
Enamorus	Level up	31
Togepi	Level up	34
Togetic	Level up	34
Dustox	Level up	34
Togekiss	Level up	34
Arceus	Level up	36
Bronzor	Level up	43
Bronzong	Level up	43

Brilliant Diamond and Shining Pearl: 28 species

Species	Method	Level
Ninetales	Level up	1
Exeggutor	Level up	1
Shiftry	Level up	1
Hoothoot	Level up	21
Chimecho	Level up	22
Noctowl	Level up	23
Baltoy	Level up	27
Claydol	Level up	27
Vulpix	Level up, Egg	28
Bronzor	Level up	28
Bronzong	Level up	28
Uxie	Level up	35
Mesprit	Level up	35
Azelf	Level up	35
Lugia	Level up	36
Ho-Oh	Level up	36
Exeggcute	Level up	40
Nuzleaf	Level up	43
Raikou	Level up	48
Entei	Level up	48
Suicune	Level up	48
Cyndaquil	Egg
Togepi	Egg
Stantler	Egg
Whismur	Egg
Roselia	Egg
Spoink	Egg
Budew	Egg

Sword and Shield: 33 species

Species	Method	Level
Ninetales	Level up	1
Exeggutor	Level up	1
Shiftry	Level up	1
Hoothoot	Level up	21
Noctowl	Level up	23
Reshiram	Level up	24
Baltoy	Level up	27
Claydol	Level up	27
Vulpix	Level up	28
Bronzor	Level up	28
Bronzong	Level up	28
Drampa	Level up	30
Uxie	Level up	35
Mesprit	Level up	35
Azelf	Level up	35
Lugia	Level up	36
Ho-Oh	Level up	36
Exeggcute	Level up	40
Tapu Lele	Level up	40
Nuzleaf	Level up	43
Tornadus	Level up	45
Landorus	Level up	45
Raikou	Level up	48
Entei	Level up	48
Suicune	Level up	48
Togepi	Egg
Whismur	Egg
Roselia	Egg
Budew	Egg
Darumaka	Egg
Zorua	Egg
Oranguru	Egg
Indeedee	Egg

Ultra Sun and Ultra Moon: 33 species

Species	Method	Level
Raikou	Level up	1, 64
Entei	Level up	1, 64
Hoothoot	Level up	22
Chimecho	Level up	22
Noctowl	Level up	23
Lugia	Level up	23
Ho-Oh	Level up	23
Tornadus	Level up	25
Landorus	Level up	25
Vulpix	Level up, Egg	31
Baltoy	Level up	31
Claydol	Level up	31
Nuzleaf	Level up	36
Drampa	Level up	37
Bronzor	Level up	39
Bronzong	Level up	42
Reshiram	Level up	43
Exeggcute	Level up	47
Tapu Lele	Level up	48
Greninja	Level up	49
Uxie	Level up	50
Mesprit	Level up	50
Azelf	Level up	50
Suicune	Level up	64
Cyndaquil	Egg
Togepi	Egg
Stantler	Egg
Whismur	Egg
Spoink	Egg
Budew	Egg
Darumaka	Egg
Zorua	Egg
Oranguru	Egg

Sun and Moon: 32 species

Species	Method	Level
Raikou	Level up	1, 64
Entei	Level up	1, 64
Hoothoot	Level up	22
Chimecho	Level up	22
Noctowl	Level up	23
Lugia	Level up	23
Ho-Oh	Level up	23
Tornadus	Level up	25
Landorus	Level up	25
Vulpix	Level up, Egg	31
Baltoy	Level up	31
Claydol	Level up	31
Nuzleaf	Level up	36
Drampa	Level up	37
Bronzor	Level up	39
Bronzong	Level up	42
Reshiram	Level up	43
Exeggcute	Level up	47
Tapu Lele	Level up	48
Greninja	Level up	49
Uxie	Level up	50
Mesprit	Level up	50
Azelf	Level up	50
Suicune	Level up	64
Cyndaquil	Egg
Togepi	Egg
Stantler	Egg
Whismur	Egg
Spoink	Egg
Budew	Egg
Zorua	Egg
Oranguru	Egg

Omega Ruby and Alpha Sapphire: 29 species

Species	Method	Level
Raikou	Level up	1, 64
Entei	Level up	1, 64
Suicune	Level up	1, 64
Chimecho	Level up	22
Lugia	Level up	23
Ho-Oh	Level up	23
Vulpix	Level up, Egg	31
Baltoy	Level up	31
Claydol	Level up	31
Tornadus	Level up	31
Landorus	Level up	31
Nuzleaf	Level up	36
Bronzor	Level up	39
Bronzong	Level up	42
Reshiram	Level up	43
Hoothoot	Level up	45
Exeggcute	Level up	47
Greninja	Level up	49
Uxie	Level up	50
Mesprit	Level up	50
Azelf	Level up	50
Noctowl	Level up	52
Cyndaquil	Egg
Togepi	Egg
Stantler	Egg
Whismur	Egg
Spoink	Egg
Budew	Egg
Zorua	Egg

X and Y: 29 species

Species	Method	Level
Raikou	Level up	1, 64
Entei	Level up	1, 64
Suicune	Level up	1, 64
Lugia	Level up	23
Ho-Oh	Level up	23
Baltoy	Level up	28
Claydol	Level up	28
Tornadus	Level up	31
Landorus	Level up	31
Vulpix	Level up, Egg	39
Bronzor	Level up	39
Bronzong	Level up	42
Reshiram	Level up	43
Hoothoot	Level up	45
Chimecho	Level up	46
Exeggcute	Level up	47
Nuzleaf	Level up	49
Greninja	Level up	49
Uxie	Level up	50
Mesprit	Level up	50
Azelf	Level up	50
Noctowl	Level up	52
Cyndaquil	Egg
Togepi	Egg
Stantler	Egg
Whismur	Egg
Spoink	Egg
Budew	Egg
Zorua	Egg

Changed over time

One change since Generation III

1. Through Gen VPP 3020 from X and Y, Generation VI