Recover is learned by 59 species by level and 11 by egg

Effect, in PokéAPI's words

“Heals the user by half its max HP.”

Who learns it

66 species in all, 8 of 25 games shown

Scarlet and Violet: 44 species

Species	Method	Level
Gastrodon	Level up	1
Duosion	Level up	1
Reuniclus	Level up	1
Solosis	Level up	4
Latias	Level up	10
Latios	Level up	10
Shellos	Level up	10
Mareanie	Level up	20
Toxapex	Level up	20
Appletun	Level up	24
Nacli	Level up	25
Milotic	Level up	28
Bergmite	Level up	30
Avalugg	Level up	30
Pincurchin	Level up	30
Naclstack	Level up	30
Garganacl	Level up	30
Porygon	Level up	35
Porygon2	Level up	35
Porygon-Z	Level up	35
Dipplin	Level up	36
Hydrapple	Level up	36
Milcery	Level up	40
Alcremie	Level up	40
Meditite	Level up	41
Gholdengo	Level up	42
Slugma	Level up	43
Cryogonal	Level up	44
Lugia	Level up	45
Ho-Oh	Level up	45
Magcargo	Level up	47
Medicham	Level up	47
Deoxys	Level up	61
Chien-Pao	Level up	65
Arceus	Level up	70
Eternatus	Level up	72
Pecharunt	Level up	72
Mewtwo	Level up	80
Wooper	Egg
Sableye	Egg
Chimecho	Egg
Chingling	Egg
Rellor	Egg
Veluza	Egg

Legends Arceus: 15 species

Species	Method	Level
Cresselia	Level up	27
Shaymin	Level up	27
Arceus	Level up	27
Kadabra	Level up	34
Alakazam	Level up	34
Chimecho	Level up	34
Chingling	Level up	34
Porygon	Level up	37
Shellos	Level up	37
Gastrodon	Level up	37
Porygon-Z	Level up	37
Petilil	Level up	37
Gardevoir	Level up	52
Vespiquen	Level up	52
Mesprit	Level up	57

Brilliant Diamond and Shining Pearl: 27 species

Species	Method	Level
Starmie	Level up	1
Gastrodon	Level up	1
Latias	Level up	10
Latios	Level up	10
Shellos	Level up	10
Kadabra	Level up	25
Alakazam	Level up	25
Milotic	Level up	28
Porygon	Level up	35
Porygon2	Level up	35
Porygon-Z	Level up	35
Meditite	Level up	41
Slugma	Level up	43
Lugia	Level up	45
Ho-Oh	Level up	45
Magcargo	Level up	47
Medicham	Level up	47
Staryu	Level up	48
Corsola	Level up	50
Celebi	Level up	60
Mewtwo	Level up	80
Wooper	Egg
Sableye	Egg
Lileep	Egg
Kecleon	Egg
Chimecho	Egg
Chingling	Egg

Sword and Shield: 41 species

Species	Method	Level
Starmie	Level up	1
Gastrodon	Level up	1
Duosion	Level up	1
Reuniclus	Level up	1
Solosis	Level up	4
Latias	Level up	10
Latios	Level up	10
Shellos	Level up	10
Mareanie	Level up	20
Toxapex	Level up	20
Appletun	Level up	24
Kadabra	Level up	25
Alakazam	Level up	25
Milotic	Level up	28
Frillish	Level up	28
Jellicent	Level up	28
Bergmite	Level up	30
Avalugg	Level up	30
Pincurchin	Level up	30
Porygon	Level up	35
Porygon2	Level up	35
Porygon-Z	Level up	35
Shelmet	Level up	40
Accelgor	Level up	40
Milcery	Level up	40
Alcremie	Level up	40
Elgyem	Level up	43
Cryogonal	Level up	44
Lugia	Level up	45
Ho-Oh	Level up	45
Beheeyem	Level up	45
Pyukumuku	Level up	45
Staryu	Level up	48
Corsola	Level up	50
Celebi	Level up	60
Eternatus	Level up	72
Mewtwo	Level up	80
Wooper	Egg
Sableye	Egg
Lileep	Egg
Blipbug	Egg

Let's Go Pikachu and Let's Go Eevee: 5 species

Species	Method	Level
Porygon	Level up	36
Kadabra	Level up	39
Alakazam	Level up	39
Staryu	Level up	40
Mewtwo	Level up	55

Ultra Sun and Ultra Moon: 44 species

Species	Method	Level
Starmie	Level up	1
Celebi	Level up	1
Corsola	Level up	8
Staryu	Level up	10
Frillish	Level up, Egg	17
Jellicent	Level up	17
Porygon	Level up	18
Porygon2	Level up	18
Porygon-Z	Level up	18
Solosis	Level up	24
Duosion	Level up	24
Reuniclus	Level up	24
Milotic	Level up	27
Kadabra	Level up	31
Alakazam	Level up	31
Latias	Level up	32
Latios	Level up	32
Mareanie	Level up	33
Toxapex	Level up	33
Pyukumuku	Level up	37
Meditite	Level up	41
Slugma	Level up	43
Cryogonal	Level up	45
Shellos	Level up	46
Elgyem	Level up	46
Magcargo	Level up	47
Medicham	Level up	47
Bergmite	Level up, Egg	47
Shelmet	Level up	49
Accelgor	Level up	49
Mewtwo	Level up	50
Beheeyem	Level up	50
Avalugg	Level up	51
Gastrodon	Level up	54
Deoxys	Level up	61
Arceus	Level up	70
Lugia	Level up	71
Ho-Oh	Level up	71
Wooper	Egg
Sableye	Egg
Lileep	Egg
Kecleon	Egg
Chimecho	Egg
Chingling	Egg

Sun and Moon: 44 species

Species	Method	Level
Starmie	Level up	1
Celebi	Level up	1
Corsola	Level up	8
Staryu	Level up	10
Frillish	Level up, Egg	17
Jellicent	Level up	17
Porygon	Level up	18
Porygon2	Level up	18
Porygon-Z	Level up	18
Solosis	Level up	24
Duosion	Level up	24
Reuniclus	Level up	24
Milotic	Level up	27
Kadabra	Level up	31
Alakazam	Level up	31
Latias	Level up	32
Latios	Level up	32
Mareanie	Level up	33
Toxapex	Level up	33
Pyukumuku	Level up	37
Meditite	Level up	41
Slugma	Level up	43
Cryogonal	Level up	45
Shellos	Level up	46
Elgyem	Level up	46
Magcargo	Level up	47
Medicham	Level up	47
Bergmite	Level up, Egg	47
Shelmet	Level up	49
Accelgor	Level up	49
Mewtwo	Level up	50
Beheeyem	Level up	50
Avalugg	Level up	51
Gastrodon	Level up	54
Deoxys	Level up	61
Arceus	Level up	70
Lugia	Level up	71
Ho-Oh	Level up	71
Wooper	Egg
Sableye	Egg
Lileep	Egg
Kecleon	Egg
Chimecho	Egg
Chingling	Egg

Omega Ruby and Alpha Sapphire: 41 species

Species	Method	Level
Starmie	Level up	1
Celebi	Level up	1
Corsola	Level up	8
Staryu	Level up	10
Frillish	Level up, Egg	17
Jellicent	Level up	17
Porygon	Level up	18
Porygon2	Level up	18
Porygon-Z	Level up	18
Solosis	Level up	24
Duosion	Level up	24
Reuniclus	Level up	24
Kadabra	Level up	31
Alakazam	Level up	31
Milotic	Level up	31
Latias	Level up	32
Latios	Level up	32
Meditite	Level up	41
Slugma	Level up	43
Shellos	Level up	46
Elgyem	Level up	46
Magcargo	Level up	47
Medicham	Level up	47
Bergmite	Level up, Egg	47
Cryogonal	Level up	49
Shelmet	Level up	49
Accelgor	Level up	49
Mewtwo	Level up	50
Beheeyem	Level up	50
Avalugg	Level up	51
Gastrodon	Level up	54
Deoxys	Level up	61
Arceus	Level up	70
Lugia	Level up	71
Ho-Oh	Level up	71
Wooper	Egg
Sableye	Egg
Lileep	Egg
Kecleon	Egg
Chimecho	Egg
Chingling	Egg

Changed over time

One change since Generation I

1. Through Gen IIIPP 205 from Diamond and Pearl, Generation IV