Whirlpool is learned by 25 species by level, 169 by machine and 8 by egg

Effect, in PokéAPI's words

“Prevents the target from leaving battle and inflicts 1/16 its max HP in damage for 2-5 turns.”

Who learns it

169 species in all, 8 of 19 games shown

Scarlet and Violet: 99 species

Species	Method	Level
Cloyster	Level up, Machine	1
Kingdra	Level up, Machine	1
Gyarados	Level up, Machine	4
Iron Bundle	Level up, Machine	14
Shellder	Level up, Machine	16
Buizel	Level up, Machine	31
Piplup	Level up, Machine	32
Floatzel	Level up, Machine	35
Prinplup	Level up, Machine	37
Finneon	Level up, Machine	38
Empoleon	Level up, Machine	39
Phione	Level up, Machine	39
Manaphy	Level up, Machine	39
Lumineon	Level up, Machine	42
Alomomola	Level up, Machine	49
Squirtle	Machine
Wartortle	Machine
Blastoise	Machine
Psyduck	Machine
Golduck	Machine
Poliwag	Machine
Poliwhirl	Machine
Poliwrath	Machine
Tentacool	Machine
Tentacruel	Machine
Slowpoke	Machine
Slowbro	Machine
Seel	Machine
Dewgong	Machine
Horsea	Machine
Seadra	Machine
Lapras	Machine
Vaporeon	Machine
Mew	Machine
Totodile	Machine
Croconaw	Machine
Feraligatr	Machine
Chinchou	Machine
Lanturn	Machine
Marill	Machine
Azumarill	Machine
Politoed	Machine
Wooper	Machine
Quagsire	Machine
Slowking	Machine
Qwilfish	Machine
Suicune	Machine
Lugia	Machine
Mudkip	Machine
Marshtomp	Machine
Swampert	Machine
Lotad	Machine
Lombre	Machine
Ludicolo	Machine
Wingull	Machine
Pelipper	Machine
Barboach	Machine
Whiscash	Machine
Corphish	Machine
Crawdaunt	Machine
Feebas	Machine
Milotic	Machine
Luvdisc	Machine
Latias	Machine
Kyogre	Machine
Rayquaza	Machine
Shellos	Machine
Gastrodon	Machine
Palkia	Machine
Oshawott	Machine
Dewott	Machine
Samurott	Machine
Basculin	Machine
Ducklett	Machine
Swanna	Machine
Skrelp	Machine
Dragalge	Machine
Popplio	Machine
Brionne	Machine
Primarina	Machine
Bruxish	Machine
Sobble	Machine
Drizzile	Machine
Inteleon	Machine
Chewtle	Machine
Drednaw	Machine
Cramorant	Machine
Arrokuda	Machine
Barraskewda	Machine
Eiscue	Machine
Basculegion	Machine
Quaxly	Machine
Quaxwell	Machine
Quaquaval	Machine
Wiglett	Machine
Wugtrio	Machine
Palafin	Machine
Tatsugiri	Machine
Walking Wake	Machine

Brilliant Diamond and Shining Pearl: 22 species

Species	Method	Level
Cloyster	Level up	1
Kingdra	Level up	1
Clamperl	Level up	1
Huntail	Level up	1
Gorebyss	Level up	1
Gyarados	Level up	4
Shellder	Level up	16
Wailmer	Level up	27
Wailord	Level up	27
Buizel	Level up	31
Piplup	Level up	32
Floatzel	Level up	35
Prinplup	Level up	37
Finneon	Level up	38
Empoleon	Level up	39
Manaphy	Level up	39
Lumineon	Level up	42
Lapras	Egg
Omanyte	Egg
Chinchou	Egg
Mudkip	Egg
Barboach	Egg

Sword and Shield: 124 species

Species	Method	Level
Cloyster	Level up, Machine	1
Kingdra	Level up, Machine	1
Gyarados	Level up, Machine	4
Shellder	Level up, Machine	16
Wailmer	Level up, Machine	27
Wailord	Level up, Machine	27
Dhelmise	Level up, Machine	32
Frillish	Level up, Machine	36
Jellicent	Level up, Machine	36
Squirtle	Machine
Wartortle	Machine
Blastoise	Machine
Nidoqueen	Machine
Nidoking	Machine
Psyduck	Machine
Golduck	Machine
Poliwag	Machine
Poliwhirl	Machine
Poliwrath	Machine
Tentacool	Machine
Tentacruel	Machine
Slowpoke	Machine
Slowbro	Machine
Krabby	Machine
Kingler	Machine
Lickitung	Machine
Rhydon	Machine
Kangaskhan	Machine
Horsea	Machine
Seadra	Machine
Goldeen	Machine
Seaking	Machine
Staryu	Machine
Starmie	Machine
Tauros	Machine
Lapras	Machine
Vaporeon	Machine
Omanyte	Machine
Omastar	Machine
Kabuto	Machine
Kabutops	Machine
Snorlax	Machine
Dratini	Machine
Dragonair	Machine
Dragonite	Machine
Mew	Machine
Chinchou	Machine
Lanturn	Machine
Marill	Machine
Azumarill	Machine
Politoed	Machine
Wooper	Machine
Quagsire	Machine
Slowking	Machine
Qwilfish	Machine
Sneasel	Machine
Corsola	Machine
Remoraid	Machine
Octillery	Machine
Mantine	Machine
Miltank	Machine
Suicune	Machine
Tyranitar	Machine
Lugia	Machine
Mudkip	Machine
Marshtomp	Machine
Swampert	Machine
Zigzagoon	Machine
Linoone	Machine
Lotad	Machine
Lombre	Machine
Ludicolo	Machine
Pelipper	Machine
Exploud	Machine
Azurill	Machine
Aggron	Machine
Carvanha	Machine
Sharpedo	Machine
Barboach	Machine
Whiscash	Machine
Corphish	Machine
Crawdaunt	Machine
Feebas	Machine
Milotic	Machine
Spheal	Machine
Sealeo	Machine
Walrein	Machine
Relicanth	Machine
Latias	Machine
Latios	Machine
Kyogre	Machine
Rayquaza	Machine
Shellos	Machine
Gastrodon	Machine
Garchomp	Machine
Munchlax	Machine
Mantyke	Machine
Weavile	Machine
Lickilicky	Machine
Rhyperior	Machine
Palkia	Machine
Basculin	Machine
Tirtouga	Machine
Carracosta	Machine
Barbaracle	Machine
Popplio	Machine
Brionne	Machine
Primarina	Machine
Wishiwashi	Machine
Tapu Fini	Machine
Sobble	Machine
Drizzile	Machine
Inteleon	Machine
Chewtle	Machine
Drednaw	Machine
Cramorant	Machine
Arrokuda	Machine
Barraskewda	Machine
Grapploct	Machine
Obstagoon	Machine
Cursola	Machine
Eiscue	Machine
Dracovish	Machine
Arctovish	Machine

Ultra Sun and Ultra Moon: 26 species

Species	Method	Level
Clamperl	Level up	1
Huntail	Level up	1
Gorebyss	Level up	1
Wailmer	Level up	13
Wailord	Level up	13
Tapu Fini	Level up	14
Dhelmise	Level up	27
Buizel	Level up	31
Piplup	Level up	32
Mudkip	Level up, Egg	33
Floatzel	Level up	35
Prinplup	Level up	37
Finneon	Level up	38
Empoleon	Level up	39
Phione	Level up	39
Manaphy	Level up	39
Shellder	Level up	40
Lumineon	Level up	42
Alomomola	Level up	49
Lapras	Egg
Omanyte	Egg
Chinchou	Egg
Barboach	Egg
Basculin	Egg
Tirtouga	Egg
Wishiwashi	Egg

Sun and Moon: 25 species

Species	Method	Level
Clamperl	Level up	1
Huntail	Level up	1
Gorebyss	Level up	1
Wailmer	Level up	13
Wailord	Level up	13
Tapu Fini	Level up	14
Dhelmise	Level up	27
Buizel	Level up	31
Piplup	Level up	32
Mudkip	Level up, Egg	33
Floatzel	Level up	35
Prinplup	Level up	37
Finneon	Level up	38
Empoleon	Level up	39
Phione	Level up	39
Manaphy	Level up	39
Shellder	Level up	40
Lumineon	Level up	42
Alomomola	Level up	49
Lapras	Egg
Omanyte	Egg
Chinchou	Egg
Barboach	Egg
Basculin	Egg
Tirtouga	Egg

Omega Ruby and Alpha Sapphire: 22 species

Species	Method	Level
Clamperl	Level up	1
Huntail	Level up	1
Gorebyss	Level up	1
Wailmer	Level up	13
Wailord	Level up	13
Buizel	Level up	31
Piplup	Level up	32
Mudkip	Level up, Egg	33
Floatzel	Level up	35
Prinplup	Level up	37
Finneon	Level up	38
Empoleon	Level up	39
Phione	Level up	39
Manaphy	Level up	39
Shellder	Level up	40
Lumineon	Level up	42
Lapras	Egg
Omanyte	Egg
Chinchou	Egg
Barboach	Egg
Basculin	Egg
Tirtouga	Egg

X and Y: 22 species

Species	Method	Level
Clamperl	Level up	1
Huntail	Level up	1
Gorebyss	Level up	1
Wailmer	Level up	14
Wailord	Level up	14
Buizel	Level up	31
Piplup	Level up	32
Mudkip	Level up, Egg	33
Floatzel	Level up	35
Prinplup	Level up	37
Finneon	Level up	38
Empoleon	Level up	39
Phione	Level up	39
Manaphy	Level up	39
Shellder	Level up	40
Lumineon	Level up	42
Lapras	Egg
Omanyte	Egg
Chinchou	Egg
Barboach	Egg
Basculin	Egg
Tirtouga	Egg

Black 2 and White 2: 22 species

Species	Method	Level
Clamperl	Level up	1
Huntail	Level up	1
Gorebyss	Level up	1
Wailmer	Level up	14
Wailord	Level up	14
Buizel	Level up	31
Piplup	Level up	32
Mudkip	Level up, Egg	33
Floatzel	Level up	35
Prinplup	Level up	37
Finneon	Level up	38
Empoleon	Level up	39
Phione	Level up	39
Manaphy	Level up	39
Shellder	Level up	40
Lumineon	Level up	42
Lapras	Egg
Omanyte	Egg
Chinchou	Egg
Barboach	Egg
Basculin	Egg
Tirtouga	Egg

Changed over time

2 changes since Generation II

1. Through Gen IVPower 1535 from Black and White, Generation V
2. Through Gen IVAccuracy 70%85% from Black and White, Generation V