Tailwind is learned by 38 species by level, 93 by machine, 116 by tutor and 12 by egg

Effect, in PokéAPI's words

“For three turns, friendly Pokémon have doubled Speed.”

Who learns it

140 species in all, 8 of 12 games shown

Scarlet and Violet: 93 species

Species	Method	Level
Pelipper	Level up, Machine	1
Whimsicott	Level up, Machine	1
Rufflet	Level up, Machine	18
Braviary	Level up, Machine	18
Vullaby	Level up, Machine	18
Mandibuzz	Level up, Machine	18
Latias	Level up, Machine	20
Latios	Level up, Machine	20
Articuno	Level up, Machine	30
Tornadus	Level up, Machine	30
Fletchling	Level up, Machine	35
Suicune	Level up, Machine	36
Ducklett	Level up, Machine	37
Drifloon	Level up, Machine	40
Swanna	Level up, Machine	40
Fletchinder	Level up, Machine	43
Frosmoth	Level up, Machine	44
Talonflame	Level up, Machine	47
Drifblim	Level up, Machine	48
Finneon	Level up, Machine	49
Noibat	Level up, Machine	49
Noivern	Level up, Machine	51
Lumineon	Level up, Machine	59
Doduo	Machine
Dodrio	Machine
Scyther	Machine
Zapdos	Machine
Moltres	Machine
Dragonite	Machine
Mew	Machine
Hoothoot	Machine
Noctowl	Machine
Hoppip	Machine
Skiploom	Machine
Jumpluff	Machine
Yanma	Machine
Murkrow	Machine
Gligar	Machine
Scizor	Machine
Delibird	Machine
Skarmory	Machine
Lugia	Machine
Ho-Oh	Machine
Shiftry	Machine
Wingull	Machine
Masquerain	Machine
Volbeat	Machine
Illumise	Machine
Vibrava	Machine
Flygon	Machine
Swablu	Machine, Egg
Altaria	Machine
Tropius	Machine
Salamence	Machine
Rayquaza	Machine
Starly	Machine
Staravia	Machine
Staraptor	Machine
Honchkrow	Machine
Yanmega	Machine
Gliscor	Machine
Shaymin	Machine
Arceus	Machine
Hydreigon	Machine
Volcarona	Machine
Reshiram	Machine
Zekrom	Machine
Vivillon	Machine
Dartrix	Machine
Decidueye	Machine
Pikipek	Machine
Trumbeak	Machine
Toucannon	Machine
Oricorio	Machine
Cutiefly	Machine
Ribombee	Machine
Comfey	Machine
Lunala	Machine
Rookidee	Machine, Egg
Corvisquire	Machine
Corviknight	Machine, Egg
Cramorant	Machine
Kleavor	Machine
Enamorus	Machine
Squawkabilly	Machine
Wattrel	Machine
Kilowattrel	Machine
Bombirdier	Machine
Flamigo	Machine
Dudunsparce	Machine
Iron Jugulis	Machine
Roaring Moon	Machine
Fezandipiti	Machine

Brilliant Diamond and Shining Pearl: 22 species

Species	Method	Level
Crobat	Level up	1
Xatu	Level up	1
Pelipper	Level up	1
Honchkrow	Level up	1
Latias	Level up	20
Latios	Level up	20
Articuno	Level up	30
Butterfree	Level up	36
Suicune	Level up	36
Drifloon	Level up, Egg	40
Pidgey	Level up	41
Pidgeotto	Level up	47
Drifblim	Level up	48
Finneon	Level up	49
Pidgeot	Level up	50
Murkrow	Level up	50
Lumineon	Level up	59
Aerodactyl	Egg
Ledyba	Egg
Mantine	Egg
Swablu	Egg
Mantyke	Egg

Sword and Shield: 34 species

Species	Method	Level
Crobat	Level up	1
Xatu	Level up	1
Pelipper	Level up	1
Whimsicott	Level up	1
Rufflet	Level up	18
Braviary	Level up	18
Vullaby	Level up	18
Mandibuzz	Level up	18
Latias	Level up	20
Latios	Level up	20
Yveltal	Level up	25
Articuno	Level up	30
Tornadus	Level up	30
Fletchling	Level up	35
Butterfree	Level up	36
Suicune	Level up	36
Archen	Level up	36
Archeops	Level up	36
Drifloon	Level up	40
Pidove	Level up	40
Fletchinder	Level up	43
Frosmoth	Level up	44
Sigilyph	Level up	45
Talonflame	Level up	47
Drifblim	Level up	48
Noibat	Level up	49
Tranquill	Level up	50
Noivern	Level up	51
Unfezant	Level up	58
Aerodactyl	Egg
Mantine	Egg
Swablu	Egg
Mantyke	Egg
Rookidee	Egg

Ultra Sun and Ultra Moon: 116 species

Species	Method	Level
Xatu	Level up, Tutor	1
Pelipper	Level up, Tutor	1, 44
Sigilyph	Level up, Tutor	11
Whimsicott	Level up, Tutor	28
Noibat	Level up, Tutor, Egg	35
Noivern	Level up, Tutor	35
Ducklett	Level up, Tutor	37
Rufflet	Level up, Tutor	37
Braviary	Level up, Tutor	37
Vullaby	Level up, Tutor	37
Mandibuzz	Level up, Tutor	37
Swanna	Level up, Tutor	40
Butterfree	Level up, Tutor	41
Pidgey	Level up, Tutor	41
Fletchling	Level up, Tutor, Egg	45
Pidove	Level up, Tutor	46
Pidgeotto	Level up, Tutor	47
Tornadus	Level up, Tutor	49
Pidgeot	Level up, Tutor	50
Murkrow	Level up, Tutor	50
Fletchinder	Level up, Tutor	51
Tranquill	Level up, Tutor	54
Talonflame	Level up, Tutor	55
Suicune	Level up, Tutor	57
Unfezant	Level up, Tutor	60
Articuno	Level up, Tutor	64
Charizard	Tutor
Beedrill	Tutor
Spearow	Tutor
Fearow	Tutor
Zubat	Tutor
Golbat	Tutor
Venomoth	Tutor
Farfetch’d	Tutor
Scyther	Tutor
Aerodactyl	Tutor, Egg
Zapdos	Tutor
Moltres	Tutor
Dragonite	Tutor
Mew	Tutor
Hoothoot	Tutor
Noctowl	Tutor
Ledyba	Tutor, Egg
Ledian	Tutor
Crobat	Tutor
Togetic	Tutor
Natu	Tutor
Yanma	Tutor
Gligar	Tutor
Scizor	Tutor
Mantine	Tutor
Skarmory	Tutor
Lugia	Tutor
Ho-Oh	Tutor
Beautifly	Tutor
Dustox	Tutor
Shiftry	Tutor
Taillow	Tutor
Swellow	Tutor
Wingull	Tutor
Masquerain	Tutor
Volbeat	Tutor
Illumise	Tutor
Vibrava	Tutor
Flygon	Tutor
Swablu	Tutor
Altaria	Tutor
Castform	Tutor
Tropius	Tutor
Salamence	Tutor
Latias	Tutor
Latios	Tutor
Rayquaza	Tutor
Starly	Tutor
Staravia	Tutor
Staraptor	Tutor
Mothim	Tutor
Combee	Tutor
Vespiquen	Tutor
Drifloon	Tutor, Egg
Drifblim	Tutor
Honchkrow	Tutor
Chatot	Tutor
Finneon	Tutor
Lumineon	Tutor
Mantyke	Tutor, Egg
Togekiss	Tutor
Yanmega	Tutor
Gliscor	Tutor
Arceus	Tutor
Woobat	Tutor
Swoobat	Tutor
Cottonee	Tutor
Archen	Tutor
Archeops	Tutor
Emolga	Tutor
Hydreigon	Tutor
Volcarona	Tutor
Reshiram	Tutor
Zekrom	Tutor
Vivillon	Tutor
Hawlucha	Tutor
Yveltal	Tutor
Decidueye	Tutor
Pikipek	Tutor, Egg
Trumbeak	Tutor
Toucannon	Tutor
Oricorio	Tutor, Egg
Cutiefly	Tutor
Ribombee	Tutor
Comfey	Tutor
Silvally	Tutor
Drampa	Tutor
Lunala	Tutor
Kartana	Tutor
Naganadel	Tutor

Sun and Moon: 32 species

Species	Method	Level
Xatu	Level up	1
Pelipper	Level up	1, 44
Sigilyph	Level up	11
Whimsicott	Level up	28
Noibat	Level up, Egg	35
Noivern	Level up	35
Ducklett	Level up	37
Rufflet	Level up	37
Braviary	Level up	37
Vullaby	Level up	37
Mandibuzz	Level up	37
Swanna	Level up	40
Butterfree	Level up	41
Pidgey	Level up	41
Fletchling	Level up, Egg	45
Pidove	Level up	46
Pidgeotto	Level up	47
Tornadus	Level up	49
Pidgeot	Level up	50
Murkrow	Level up	50
Fletchinder	Level up	51
Tranquill	Level up	54
Talonflame	Level up	55
Suicune	Level up	57
Unfezant	Level up	60
Articuno	Level up	64
Aerodactyl	Egg
Ledyba	Egg
Drifloon	Egg
Mantyke	Egg
Pikipek	Egg
Oricorio	Egg

Omega Ruby and Alpha Sapphire: 103 species

Species	Method	Level
Articuno	Level up, Tutor	1, 64
Xatu	Level up, Tutor	1
Suicune	Level up, Tutor	1, 57
Pelipper	Level up, Tutor	1, 44
Tornadus	Level up, Tutor	1, 55
Sigilyph	Level up, Tutor	11
Whimsicott	Level up, Tutor	28
Butterfree	Level up, Tutor	30
Noibat	Level up, Tutor, Egg	35
Noivern	Level up, Tutor	35
Ducklett	Level up, Tutor	37
Rufflet	Level up, Tutor	37
Braviary	Level up, Tutor	37
Vullaby	Level up, Tutor	37
Mandibuzz	Level up, Tutor	37
Swanna	Level up, Tutor	40
Pidgey	Level up, Tutor	41
Fletchling	Level up, Tutor, Egg	45
Pidove	Level up, Tutor	46
Pidgeotto	Level up, Tutor	47
Pidgeot	Level up, Tutor	50
Murkrow	Level up, Tutor	50
Fletchinder	Level up, Tutor	51
Tranquill	Level up, Tutor	54
Talonflame	Level up, Tutor	55
Unfezant	Level up, Tutor	60
Charizard	Tutor
Beedrill	Tutor
Spearow	Tutor
Fearow	Tutor
Zubat	Tutor
Golbat	Tutor
Venomoth	Tutor
Farfetch’d	Tutor
Scyther	Tutor
Aerodactyl	Tutor, Egg
Zapdos	Tutor
Moltres	Tutor
Dragonite	Tutor
Mew	Tutor
Hoothoot	Tutor
Noctowl	Tutor
Ledyba	Tutor, Egg
Ledian	Tutor
Crobat	Tutor
Togetic	Tutor
Natu	Tutor
Yanma	Tutor
Gligar	Tutor
Scizor	Tutor
Mantine	Tutor
Skarmory	Tutor
Lugia	Tutor
Ho-Oh	Tutor
Beautifly	Tutor
Dustox	Tutor
Shiftry	Tutor
Taillow	Tutor
Swellow	Tutor
Wingull	Tutor
Masquerain	Tutor
Volbeat	Tutor
Illumise	Tutor
Vibrava	Tutor
Flygon	Tutor
Swablu	Tutor
Altaria	Tutor
Castform	Tutor
Tropius	Tutor
Salamence	Tutor
Latias	Tutor
Latios	Tutor
Rayquaza	Tutor
Starly	Tutor
Staravia	Tutor
Staraptor	Tutor
Mothim	Tutor
Combee	Tutor
Vespiquen	Tutor
Drifloon	Tutor, Egg
Drifblim	Tutor
Honchkrow	Tutor
Chatot	Tutor
Finneon	Tutor
Lumineon	Tutor
Mantyke	Egg
Togekiss	Tutor
Yanmega	Tutor
Gliscor	Tutor
Arceus	Tutor
Woobat	Tutor
Swoobat	Tutor
Cottonee	Tutor
Archen	Tutor
Archeops	Tutor
Emolga	Tutor
Hydreigon	Tutor
Volcarona	Tutor
Reshiram	Tutor
Zekrom	Tutor
Vivillon	Tutor
Hawlucha	Tutor
Yveltal	Tutor

X and Y: 30 species

Species	Method	Level
Articuno	Level up	1, 64
Suicune	Level up	1, 57
Pelipper	Level up	1, 52
Tornadus	Level up	1, 55
Sigilyph	Level up	11
Xatu	Level up	27
Whimsicott	Level up	28
Butterfree	Level up	30
Noibat	Level up, Egg	35
Noivern	Level up	35
Ducklett	Level up	37
Rufflet	Level up	37
Braviary	Level up	37
Vullaby	Level up	37
Mandibuzz	Level up	37
Swanna	Level up	40
Pidgey	Level up	41
Fletchling	Level up, Egg	45
Pidove	Level up	46
Pidgeotto	Level up	47
Pidgeot	Level up	50
Murkrow	Level up	50
Fletchinder	Level up	51
Tranquill	Level up	54
Talonflame	Level up	55
Unfezant	Level up	60
Aerodactyl	Egg
Ledyba	Egg
Drifloon	Egg
Mantyke	Egg

Black 2 and White 2: 94 species

Species	Method	Level
Sigilyph	Level up, Tutor	11
Xatu	Level up, Tutor	27
Whimsicott	Level up, Tutor	28
Butterfree	Level up, Tutor	30
Ducklett	Level up, Tutor	37
Rufflet	Level up, Tutor	37
Braviary	Level up, Tutor	37
Vullaby	Level up, Tutor	37
Mandibuzz	Level up, Tutor	37
Swanna	Level up, Tutor	40
Pidgey	Level up, Tutor	41
Pidove	Level up, Tutor	46
Pidgeotto	Level up, Tutor	47
Pidgeot	Level up, Tutor	50
Murkrow	Level up, Tutor	51
Pelipper	Level up, Tutor	52
Tranquill	Level up, Tutor	54
Tornadus	Level up, Tutor	55
Suicune	Level up, Tutor	57
Unfezant	Level up, Tutor	60
Articuno	Level up, Tutor	64
Charizard	Tutor
Beedrill	Tutor
Spearow	Tutor
Fearow	Tutor
Zubat	Tutor
Golbat	Tutor
Venomoth	Tutor
Farfetch’d	Tutor
Scyther	Tutor
Aerodactyl	Tutor, Egg
Zapdos	Tutor
Moltres	Tutor
Dragonite	Tutor
Mew	Tutor
Hoothoot	Tutor
Noctowl	Tutor
Ledyba	Tutor
Ledian	Tutor
Crobat	Tutor
Togetic	Tutor
Natu	Tutor
Yanma	Tutor
Gligar	Tutor
Scizor	Tutor
Mantine	Tutor
Skarmory	Tutor
Lugia	Tutor
Ho-Oh	Tutor
Beautifly	Tutor
Dustox	Tutor
Shiftry	Tutor
Taillow	Tutor
Swellow	Tutor
Wingull	Tutor
Masquerain	Tutor
Volbeat	Tutor
Illumise	Tutor
Vibrava	Tutor
Flygon	Tutor
Swablu	Tutor
Altaria	Tutor
Castform	Tutor
Tropius	Tutor
Salamence	Tutor
Latias	Tutor
Latios	Tutor
Rayquaza	Tutor
Starly	Tutor
Staravia	Tutor
Staraptor	Tutor
Mothim	Tutor
Combee	Tutor
Vespiquen	Tutor
Drifloon	Tutor
Drifblim	Tutor
Honchkrow	Tutor
Chatot	Tutor
Finneon	Tutor
Lumineon	Tutor
Togekiss	Tutor
Yanmega	Tutor
Gliscor	Tutor
Arceus	Tutor
Woobat	Tutor
Swoobat	Tutor
Cottonee	Tutor
Archen	Tutor
Archeops	Tutor
Emolga	Tutor
Hydreigon	Tutor
Volcarona	Tutor
Reshiram	Tutor
Zekrom	Tutor

Changed over time

One change since Generation IV

1. Through Gen VPP 3015 from X and Y, Generation VI