Slam is learned by 73 species by level and 16 by egg

Effect, in PokéAPI's words

“Inflicts regular damage with no additional effect.”

Who learns it

84 species in all, 8 of 24 games shown

Scarlet and Violet: 54 species

Species	Method	Level
Sudowoodo	Level up	Evolve
Marill	Level up	12
Azumarill	Level up	12
Azurill	Level up	12
Wooper	Level up	16
Quagsire	Level up	16
Wugtrio	Level up	16
Clodsire	Level up	16
Ogerpon	Level up	18
Wiglett	Level up	20
Komala	Level up	21
Phanpy	Level up	24
Donphan	Level up	24
Treecko	Level up	24
Timburr	Level up	24
Gurdurr	Level up	24
Conkeldurr	Level up	24
Grookey	Level up	24
Dratini	Level up	25
Dragonair	Level up	25
Dragonite	Level up	25
Sentret	Level up	25
Snivy	Level up	25
Crabrawler	Level up	25
Crabominable	Level up	25
Tinkatink	Level up	27
Tinkatuff	Level up	27
Tinkaton	Level up	27
Furret	Level up	28
Cranidos	Level up	28
Rampardos	Level up	28
Servine	Level up	28
Serperior	Level up	28
Deino	Level up	28
Zweilous	Level up	28
Hydreigon	Level up	28
Iron Hands	Level up	28
Grovyle	Level up	30
Sceptile	Level up	30
Thwackey	Level up	30
Rillaboom	Level up	30
Pawmo	Level up	32
Pawmot	Level up	33
Pawmi	Level up	35
Minccino	Level up	40
Silicobra	Level up	40
Sandaconda	Level up	42
Bellsprout	Level up	47
Weepinbell	Level up	54
Aipom	Egg
Tropius	Egg
Ambipom	Egg
Cinccino	Egg
Cufant	Egg

Brilliant Diamond and Shining Pearl: 39 species

Species	Method	Level
Sudowoodo	Level up	Evolve, 1
Raichu	Level up	1
Victreebel	Level up	1
Marill	Level up	12
Azumarill	Level up	12
Azurill	Level up, Egg	12
Wooper	Level up	16
Quagsire	Level up	16
Phanpy	Level up	24
Donphan	Level up	24
Treecko	Level up	24
Dratini	Level up	25
Dragonair	Level up	25
Dragonite	Level up	25
Sentret	Level up	25
Pikachu	Level up	28
Furret	Level up	28
Grovyle	Level up	30
Sceptile	Level up	30
Onix	Level up	36
Krabby	Level up, Egg	36
Steelix	Level up	36
Tangela	Level up	40
Tangrowth	Level up	40
Kingler	Level up	42
Bellsprout	Level up	47
Lickitung	Level up	48
Lickilicky	Level up	48
Weepinbell	Level up	54
Ekans	Egg
Seel	Egg
Omanyte	Egg
Aipom	Egg
Mantine	Egg
Mawile	Egg
Tropius	Egg
Cranidos	Egg
Carnivine	Egg
Mantyke	Egg

Sword and Shield: 48 species

Species	Method	Level
Sudowoodo	Level up	Evolve, 1
Raichu	Level up	1
Cinccino	Level up	1
Marill	Level up	12
Azumarill	Level up	12
Azurill	Level up	12
Wooper	Level up	16
Quagsire	Level up	16
Treecko	Level up	24
Timburr	Level up	24
Gurdurr	Level up	24
Conkeldurr	Level up	24
Grookey	Level up	24
Dratini	Level up	25
Dragonair	Level up	25
Dragonite	Level up	25
Pikachu	Level up	28
Deino	Level up	28
Zweilous	Level up	28
Hydreigon	Level up	28
Grovyle	Level up	30
Sceptile	Level up	30
Thwackey	Level up	30
Rillaboom	Level up	30
Sizzlipede	Level up	30
Centiskorch	Level up	32
Runerigus	Level up	32
Onix	Level up	36
Krabby	Level up	36
Steelix	Level up	36
Tangela	Level up	40
Tangrowth	Level up	40
Minccino	Level up	40
Dhelmise	Level up	40
Silicobra	Level up	40
Kingler	Level up	42
Sandaconda	Level up	42
Lickitung	Level up	48
Lickilicky	Level up	48
Dracozolt	Level up	49
Arctozolt	Level up	49
Sirfetch’d	Level up	50
Omanyte	Egg
Mantine	Egg
Mawile	Egg
Mantyke	Egg
Tirtouga	Egg
Cufant	Egg

Let's Go Pikachu and Let's Go Eevee: 13 species

Species	Method	Level
Pikachu	Level up	24
Onix	Level up	25
Ekans	Level up	28
Bellsprout	Level up	30
Lickitung	Level up	30
Krabby	Level up	32
Dratini	Level up	35
Arbok	Level up	36
Kingler	Level up	37
Dragonair	Level up	40
Dragonite	Level up	40
Tangela	Level up	44
Weepinbell	Level up	45

Ultra Sun and Ultra Moon: 47 species

Species	Method	Level
Sudowoodo	Level up	Evolve, 1
Wooper	Level up	15
Quagsire	Level up	15
Azurill	Level up, Egg	20
Dratini	Level up	21
Dragonair	Level up	21
Dragonite	Level up	21
Komala	Level up	21
Phanpy	Level up	24
Donphan	Level up	24
Sentret	Level up	25
Snivy	Level up	25
Onix	Level up	28
Furret	Level up	28
Steelix	Level up	28
Servine	Level up	28
Serperior	Level up	28
Deino	Level up	28
Zweilous	Level up	28
Hydreigon	Level up	28
Lickitung	Level up	29
Treecko	Level up	29
Lickilicky	Level up	29
Grovyle	Level up	33
Sceptile	Level up	33
Krabby	Level up, Egg	35
Pikachu	Level up	37
Minccino	Level up	37
Tangela	Level up	41
Patrat	Level up	41
Tangrowth	Level up	43
Kingler	Level up	44
Dhelmise	Level up	45
Bellsprout	Level up	47
Watchog	Level up	50
Weepinbell	Level up	54
Ekans	Egg
Seel	Egg
Omanyte	Egg
Aipom	Egg
Mantine	Egg
Mawile	Egg
Tropius	Egg
Cranidos	Egg
Carnivine	Egg
Mantyke	Egg
Tirtouga	Egg

Sun and Moon: 47 species

Species	Method	Level
Sudowoodo	Level up	Evolve, 1
Wooper	Level up	15
Quagsire	Level up	15
Azurill	Level up, Egg	20
Dratini	Level up	21
Dragonair	Level up	21
Dragonite	Level up	21
Komala	Level up	21
Phanpy	Level up	24
Donphan	Level up	24
Sentret	Level up	25
Snivy	Level up	25
Onix	Level up	28
Furret	Level up	28
Steelix	Level up	28
Servine	Level up	28
Serperior	Level up	28
Deino	Level up	28
Zweilous	Level up	28
Hydreigon	Level up	28
Lickitung	Level up	29
Treecko	Level up	29
Lickilicky	Level up	29
Grovyle	Level up	33
Sceptile	Level up	33
Krabby	Level up, Egg	35
Pikachu	Level up	37
Minccino	Level up	37
Tangela	Level up	41
Patrat	Level up	41
Tangrowth	Level up	43
Kingler	Level up	44
Dhelmise	Level up	45
Bellsprout	Level up	47
Watchog	Level up	50
Weepinbell	Level up	54
Ekans	Egg
Seel	Egg
Omanyte	Egg
Aipom	Egg
Mantine	Egg
Mawile	Egg
Tropius	Egg
Cranidos	Egg
Carnivine	Egg
Mantyke	Egg
Tirtouga	Egg

Omega Ruby and Alpha Sapphire: 45 species

Species	Method	Level
Sudowoodo	Level up	15
Wooper	Level up	15
Quagsire	Level up	15
Azurill	Level up, Egg	20
Dratini	Level up	21
Dragonair	Level up	21
Dragonite	Level up	21
Phanpy	Level up	24
Donphan	Level up	24
Sentret	Level up	25
Snivy	Level up	25
Onix	Level up	28
Furret	Level up	28
Steelix	Level up	28
Servine	Level up	28
Serperior	Level up	28
Deino	Level up	28
Zweilous	Level up	28
Hydreigon	Level up	28
Lickitung	Level up	29
Treecko	Level up	29
Lickilicky	Level up	29
Grovyle	Level up	33
Sceptile	Level up	33
Krabby	Level up, Egg	35
Patrat	Level up	36
Pikachu	Level up	37
Minccino	Level up	37
Bellsprout	Level up	41
Weepinbell	Level up	41
Tangela	Level up	41
Tangrowth	Level up	43
Watchog	Level up	43
Kingler	Level up	44
Ekans	Egg
Seel	Egg
Omanyte	Egg
Aipom	Egg
Mantine	Egg
Mawile	Egg
Tropius	Egg
Cranidos	Egg
Carnivine	Egg
Mantyke	Egg
Tirtouga	Egg

X and Y: 45 species

Species	Method	Level
Sudowoodo	Level up	15
Wooper	Level up	15
Quagsire	Level up	15
Azurill	Level up, Egg	20
Dratini	Level up	21
Dragonair	Level up	21
Dragonite	Level up	21
Phanpy	Level up	24
Donphan	Level up	24
Sentret	Level up	25
Snivy	Level up	25
Pikachu	Level up	26
Onix	Level up	28
Furret	Level up	28
Steelix	Level up	28
Servine	Level up	28
Serperior	Level up	28
Deino	Level up	28
Zweilous	Level up	28
Hydreigon	Level up	28
Lickitung	Level up	29
Lickilicky	Level up	29
Krabby	Level up, Egg	35
Treecko	Level up	36
Patrat	Level up	36
Minccino	Level up	37
Bellsprout	Level up	41
Weepinbell	Level up	41
Tangela	Level up	41
Grovyle	Level up	41
Sceptile	Level up	43
Tangrowth	Level up	43
Watchog	Level up	43
Kingler	Level up	44
Ekans	Egg
Seel	Egg
Omanyte	Egg
Aipom	Egg
Mantine	Egg
Mawile	Egg
Tropius	Egg
Cranidos	Egg
Carnivine	Egg
Mantyke	Egg
Tirtouga	Egg