Encore is learned by 48 species by level, 184 by machine and 33 by egg

Effect, in PokéAPI's words

“Forces the target to repeat its last used move every turn for 2 to 6 turns.”

Who learns it

187 species in all, 8 of 20 games shown

Scarlet and Violet: 144 species

Species	Method	Level
Vigoroth	Level up, Machine	1
Slaking	Level up, Machine	1
Salazzle	Level up, Machine	1
Indeedee	Level up, Machine	5
Slakoth	Level up, Machine	6
Clefairy	Level up, Machine	8
Plusle	Level up, Machine	10
Minun	Level up, Machine	10
Seel	Level up, Machine	13
Dewgong	Level up, Machine	13
Cleffa	Level up, Machine	16
Hawlucha	Level up, Machine	16
Gulpin	Level up, Machine	20
Swalot	Level up, Machine	20
Tandemaus	Level up, Machine	22
Maushold	Level up, Machine	22
Minccino	Level up, Machine	24
Popplio	Level up, Machine	24
Illumise	Level up, Machine	26
Brionne	Level up, Machine	30
Primarina	Level up, Machine	30
Oshawott	Level up, Machine	31
Finizen	Level up, Machine	34
Palafin	Level up, Machine	34
Dewott	Level up, Machine	37
Samurott	Level up, Machine	39
Pikachu	Machine
Raichu	Machine
Clefable	Machine, Egg
Vulpix	Machine
Ninetales	Machine
Jigglypuff	Machine
Wigglytuff	Machine
Psyduck	Machine
Golduck	Machine
Mankey	Machine, Egg
Primeape	Machine
Poliwag	Machine
Poliwhirl	Machine
Poliwrath	Machine
Bellsprout	Machine
Weepinbell	Machine
Victreebel	Machine
Haunter	Machine
Gengar	Machine
Drowzee	Machine
Hypno	Machine
Hitmonchan	Machine
Snorlax	Machine
Dragonite	Machine
Mew	Machine
Chikorita	Machine
Bayleef	Machine
Meganium	Machine
Pichu	Machine
Igglybuff	Machine
Bellossom	Machine
Marill	Machine
Azumarill	Machine
Politoed	Machine
Hoppip	Machine, Egg
Skiploom	Machine
Jumpluff	Machine
Sunkern	Machine, Egg
Sunflora	Machine
Wooper	Machine
Quagsire	Machine
Snubbull	Machine
Granbull	Machine
Phanpy	Machine
Donphan	Machine
Lombre	Machine
Ludicolo	Machine
Ralts	Machine
Kirlia	Machine
Gardevoir	Machine
Azurill	Machine
Sableye	Machine
Volbeat	Machine
Spoink	Machine
Grumpig	Machine
Cacnea	Machine
Cacturne	Machine
Shuppet	Machine
Banette	Machine
Chimecho	Machine
Jirachi	Machine
Chimchar	Machine, Egg
Monferno	Machine, Egg
Infernape	Machine, Egg
Pachirisu	Machine
Munchlax	Machine
Croagunk	Machine
Toxicroak	Machine
Lumineon	Machine
Gallade	Machine
Uxie	Machine
Mesprit	Machine
Azelf	Machine
Cottonee	Machine
Whimsicott	Machine
Petilil	Machine
Lilligant	Machine
Scraggy	Machine
Scrafty	Machine
Zorua	Machine
Cinccino	Machine, Egg
Solosis	Machine
Duosion	Machine
Reuniclus	Machine
Cubchoo	Machine
Beartic	Machine
Fennekin	Machine
Braixen	Machine
Delphox	Machine
Diancie	Machine
Toucannon	Machine
Comfey	Machine
Oranguru	Machine
Magearna	Machine
Toxel	Machine
Toxtricity	Machine
Alcremie	Machine
Zarude	Machine
Calyrex	Machine
Fuecoco	Machine, Egg
Skeledirge	Machine
Quaxly	Machine
Quaxwell	Machine
Quaquaval	Machine
Pawmi	Machine
Pawmo	Machine
Pawmot	Machine
Arboliva	Machine
Shroodle	Machine
Grafaiai	Machine
Tinkatink	Machine
Tinkatuff	Machine
Tinkaton	Machine
Annihilape	Machine
Scream Tail	Machine
Iron Bundle	Machine
Iron Valiant	Machine
Ogerpon	Machine

Brilliant Diamond and Shining Pearl: 38 species

Species	Method	Level
Clefairy	Level up	1
Clefable	Level up	1
Mr. Mime	Level up	1
Wobbuffet	Level up	1
Vigoroth	Level up	1, 6
Slaking	Level up	1, 6
Wynaut	Level up	1
Slakoth	Level up	6
Mime Jr.	Level up	8
Plusle	Level up	10
Minun	Level up	10
Seel	Level up, Egg	13
Dewgong	Level up	13
Cleffa	Level up	16
Gulpin	Level up	20
Swalot	Level up	20
Volbeat	Level up, Egg	26
Illumise	Level up, Egg	26
Spheal	Level up	33
Sealeo	Level up	35
Walrein	Level up	35
Psyduck	Egg
Mankey	Egg
Poliwag	Egg
Abra	Egg
Machop	Egg
Bellsprout	Egg
Ledyba	Egg
Pichu	Egg
Hoppip	Egg
Sunkern	Egg
Wooper	Egg
Ralts	Egg
Azurill	Egg
Spinda	Egg
Chimchar	Egg
Buneary	Egg
Chatot	Egg

Sword and Shield: 103 species

Species	Method	Level
Clefairy	Level up, Machine	1
Clefable	Level up, Machine	1
Mr. Mime	Level up, Machine	1
Wobbuffet	Level up, Machine	1
Wynaut	Level up, Machine	1
Cinccino	Level up, Machine	1
Aurorus	Level up, Machine	1
Salazzle	Level up, Machine	1
Mr. Rime	Level up, Machine	1
Amaura	Level up, Machine	4
Indeedee	Level up, Machine	5
Mime Jr.	Level up, Machine	8
Cleffa	Level up, Machine	16
Hawlucha	Level up, Machine	16
Minccino	Level up, Machine	24
Popplio	Level up, Machine	24
Brionne	Level up, Machine	30
Primarina	Level up, Machine	30
Spheal	Level up, Machine	33
Sealeo	Level up, Machine	35
Walrein	Level up, Machine	35
Emolga	Level up, Machine	35
Pikachu	Machine
Raichu	Machine
Vulpix	Machine
Ninetales	Machine
Psyduck	Machine
Golduck	Machine
Poliwag	Machine
Poliwhirl	Machine
Poliwrath	Machine
Abra	Machine
Kadabra	Machine
Alakazam	Machine
Machop	Machine
Machoke	Machine
Machamp	Machine
Haunter	Machine
Gengar	Machine
Jynx	Machine
Snorlax	Machine
Mew	Machine
Pichu	Machine
Togepi	Machine
Togetic	Machine
Marill	Machine
Azumarill	Machine
Politoed	Machine
Wooper	Machine
Quagsire	Machine
Shuckle	Machine
Smoochum	Machine
Lombre	Machine
Ludicolo	Machine
Ralts	Machine
Kirlia	Machine
Gardevoir	Machine
Azurill	Machine
Sableye	Machine
Jirachi	Machine
Buneary	Machine
Lopunny	Machine
Munchlax	Machine
Croagunk	Machine
Toxicroak	Machine
Togekiss	Machine
Gallade	Machine
Uxie	Machine
Mesprit	Machine
Azelf	Machine
Victini	Machine
Purrloin	Machine
Liepard	Machine
Audino	Machine
Cottonee	Machine
Whimsicott	Machine
Petilil	Machine
Lilligant	Machine
Darumaka	Machine
Darmanitan	Machine
Zoroark	Machine
Solosis	Machine
Duosion	Machine
Reuniclus	Machine
Karrablast	Machine
Escavalier	Machine
Cubchoo	Machine
Beartic	Machine
Shelmet	Machine
Accelgor	Machine
Spritzee	Machine
Aromatisse	Machine
Diancie	Machine
Comfey	Machine
Oranguru	Machine
Togedemaru	Machine
Magearna	Machine
Blacephalon	Machine
Toxel	Machine
Toxtricity	Machine
Alcremie	Machine
Zarude	Machine
Calyrex	Machine

Let's Go Pikachu and Let's Go Eevee: 9 species

Species	Method	Level
Raichu	Level up	1
Golduck	Level up	1
Primeape	Level up	1
Alakazam	Level up	1
Machamp	Level up	1
Dewgong	Level up	1, 8
Seel	Level up	8
Clefairy	Level up	22
Mr. Mime	Level up	26

Ultra Sun and Ultra Moon: 59 species

Species	Method	Level
Clefairy	Level up	1
Vigoroth	Level up	1, 6
Slaking	Level up	1, 6
Wynaut	Level up	1
Salazzle	Level up	1
Cleffa	Level up	4
Shuckle	Level up	5
Slakoth	Level up	6
Walrein	Level up	7
Spheal	Level up	9
Sealeo	Level up	9
Plusle	Level up	10
Minun	Level up	10
Seel	Level up, Egg	13
Dewgong	Level up	13
Minccino	Level up	15
Togepi	Level up	17
Togetic	Level up	17
Mr. Mime	Level up	18
Mime Jr.	Level up	18
Popplio	Level up	18
Brionne	Level up	19
Primarina	Level up	19
Gulpin	Level up	20
Swalot	Level up	20
Hawlucha	Level up	20
Illumise	Level up, Egg	26
Oshawott	Level up	31
Dewott	Level up	37
Emolga	Level up	38
Samurott	Level up	39
Amaura	Level up	44
Aurorus	Level up	46
Psyduck	Egg
Mankey	Egg
Poliwag	Egg
Abra	Egg
Machop	Egg
Bellsprout	Egg
Ledyba	Egg
Pichu	Egg
Hoppip	Egg
Sunkern	Egg
Wooper	Egg
Ralts	Egg
Azurill	Egg
Volbeat	Egg
Spinda	Egg
Chimchar	Egg
Buneary	Egg
Chatot	Egg
Purrloin	Egg
Audino	Egg
Cottonee	Egg
Petilil	Egg
Darumaka	Egg
Cubchoo	Egg
Shelmet	Egg
Togedemaru	Egg

Sun and Moon: 58 species

Species	Method	Level
Clefairy	Level up	1
Vigoroth	Level up	1, 6
Slaking	Level up	1, 6
Wynaut	Level up	1
Salazzle	Level up	1
Cleffa	Level up	4
Shuckle	Level up	5
Slakoth	Level up	6
Walrein	Level up	7
Spheal	Level up	9
Sealeo	Level up	9
Plusle	Level up	10
Minun	Level up	10
Seel	Level up, Egg	13
Dewgong	Level up	13
Minccino	Level up	15
Togepi	Level up	17
Togetic	Level up	17
Mr. Mime	Level up	18
Mime Jr.	Level up	18
Popplio	Level up	18
Brionne	Level up	19
Primarina	Level up	19
Gulpin	Level up	20
Swalot	Level up	20
Hawlucha	Level up	20
Illumise	Level up, Egg	26
Oshawott	Level up	31
Dewott	Level up	37
Emolga	Level up	38
Samurott	Level up	39
Amaura	Level up	44
Aurorus	Level up	46
Psyduck	Egg
Mankey	Egg
Poliwag	Egg
Abra	Egg
Machop	Egg
Bellsprout	Egg
Ledyba	Egg
Pichu	Egg
Hoppip	Egg
Sunkern	Egg
Wooper	Egg
Ralts	Egg
Azurill	Egg
Volbeat	Egg
Spinda	Egg
Chimchar	Egg
Buneary	Egg
Chatot	Egg
Purrloin	Egg
Audino	Egg
Cottonee	Egg
Darumaka	Egg
Cubchoo	Egg
Shelmet	Egg
Togedemaru	Egg

Omega Ruby and Alpha Sapphire: 53 species

Species	Method	Level
Clefairy	Level up	1
Vigoroth	Level up	1, 6
Slaking	Level up	1, 6
Wynaut	Level up	1
Cleffa	Level up	4
Shuckle	Level up	5
Slakoth	Level up	6
Walrein	Level up	7
Spheal	Level up	9
Sealeo	Level up	9
Plusle	Level up	10
Minun	Level up	10
Seel	Level up, Egg	13
Dewgong	Level up	13
Minccino	Level up	15
Togepi	Level up	17
Togetic	Level up	17
Mr. Mime	Level up	18
Mime Jr.	Level up	18
Gulpin	Level up	20
Swalot	Level up	20
Hawlucha	Level up	20
Illumise	Level up, Egg	26
Oshawott	Level up	31
Dewott	Level up	36
Samurott	Level up	38
Emolga	Level up	38
Amaura	Level up	44
Aurorus	Level up	46
Psyduck	Egg
Mankey	Egg
Poliwag	Egg
Abra	Egg
Machop	Egg
Bellsprout	Egg
Ledyba	Egg
Pichu	Egg
Hoppip	Egg
Sunkern	Egg
Wooper	Egg
Ralts	Egg
Azurill	Egg
Volbeat	Egg
Spinda	Egg
Chimchar	Egg
Buneary	Egg
Chatot	Egg
Purrloin	Egg
Audino	Egg
Cottonee	Egg
Darumaka	Egg
Cubchoo	Egg
Shelmet	Egg

X and Y: 53 species

Species	Method	Level
Clefairy	Level up	1
Vigoroth	Level up	1, 7
Slaking	Level up	1, 7
Wynaut	Level up	1
Sealeo	Level up	1, 7
Walrein	Level up	1, 7
Cleffa	Level up	4
Shuckle	Level up	5
Slakoth	Level up	7
Spheal	Level up	7
Seel	Level up, Egg	13
Dewgong	Level up	13
Minccino	Level up	15
Togepi	Level up	17
Togetic	Level up	17
Plusle	Level up	17
Minun	Level up	17
Mr. Mime	Level up	18
Mime Jr.	Level up	18
Hawlucha	Level up	20
Gulpin	Level up	23
Swalot	Level up	23
Illumise	Level up, Egg	25
Oshawott	Level up	31
Dewott	Level up	36
Samurott	Level up	38
Emolga	Level up	38
Amaura	Level up	44
Aurorus	Level up	46
Psyduck	Egg
Mankey	Egg
Poliwag	Egg
Abra	Egg
Machop	Egg
Bellsprout	Egg
Ledyba	Egg
Pichu	Egg
Hoppip	Egg
Sunkern	Egg
Wooper	Egg
Ralts	Egg
Azurill	Egg
Volbeat	Egg
Spinda	Egg
Chimchar	Egg
Buneary	Egg
Chatot	Egg
Purrloin	Egg
Audino	Egg
Cottonee	Egg
Darumaka	Egg
Cubchoo	Egg
Shelmet	Egg