Low Sweep is learned by 11 species by level and 138 by machine

Effect, in PokéAPI's words

“Lowers the target’s Speed by one stage.”

Who learns it

138 species in all, 6 of 9 games shown

Scarlet and Violet: 114 species

Species	Method	Level
Hitmonlee	Level up, Machine	1
Quaquaval	Level up, Machine	17
Quaxwell	Level up, Machine	19
Ogerpon	Level up, Machine	24
Slither Wing	Level up, Machine	28
Psyduck	Machine
Golduck	Machine
Mankey	Machine
Primeape	Machine
Poliwhirl	Machine
Poliwrath	Machine
Drowzee	Machine
Hypno	Machine
Hitmonchan	Machine
Electabuzz	Machine
Magmar	Machine
Mewtwo	Machine
Mew	Machine
Sudowoodo	Machine
Politoed	Machine
Aipom	Machine
Granbull	Machine
Sneasel	Machine
Tyrogue	Machine
Hitmontop	Machine
Grovyle	Machine
Sceptile	Machine
Combusken	Machine
Blaziken	Machine
Nuzleaf	Machine
Shiftry	Machine
Breloom	Machine
Vigoroth	Machine
Slaking	Machine
Makuhita	Machine
Hariyama	Machine
Sableye	Machine
Meditite	Machine
Medicham	Machine
Grumpig	Machine
Zangoose	Machine
Deoxys	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Buizel	Machine
Floatzel	Machine
Ambipom	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Weavile	Machine
Electivire	Machine
Magmortar	Machine
Gallade	Machine
Pignite	Machine
Emboar	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Krokorok	Machine
Krookodile	Machine
Scraggy	Machine
Scrafty	Machine
Zoroark	Machine
Gothitelle	Machine
Haxorus	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Meloetta	Machine
Quilladin	Machine
Chesnaught	Machine
Greninja	Machine
Hawlucha	Machine
Decidueye	Machine
Incineroar	Machine
Gumshoos	Machine
Mudbray	Machine
Mudsdale	Machine
Lurantis	Machine
Steenee	Machine
Tsareena	Machine
Passimian	Machine
Komala	Machine
Rillaboom	Machine
Scorbunny	Machine
Raboot	Machine
Cinderace	Machine
Grimmsnarl	Machine
Stonjourner	Machine
Kubfu	Machine
Urshifu	Machine
Zarude	Machine
Sneasler	Machine
Floragato	Machine
Meowscarada	Machine
Lokix	Machine
Pawmo	Machine
Pawmot	Machine
Tandemaus	Machine
Maushold	Machine
Grafaiai	Machine
Flamigo	Machine
Annihilape	Machine
Kingambit	Machine
Iron Hands	Machine
Gholdengo	Machine
Koraidon	Machine
Okidogi	Machine

Brilliant Diamond and Shining Pearl: 47 species

Species	Method	Level
Hitmonlee	Level up, Machine	1
Machop	Level up, Machine	12
Machoke	Level up, Machine	12
Machamp	Level up, Machine	12
Golduck	Machine
Mankey	Machine
Primeape	Machine
Poliwrath	Machine
Drowzee	Machine
Hypno	Machine
Hitmonchan	Machine
Electabuzz	Machine
Magmar	Machine
Mewtwo	Machine
Mew	Machine
Aipom	Machine
Sneasel	Machine
Tyrogue	Machine
Hitmontop	Machine
Grovyle	Machine
Sceptile	Machine
Combusken	Machine
Blaziken	Machine
Nuzleaf	Machine
Shiftry	Machine
Breloom	Machine
Vigoroth	Machine
Slaking	Machine
Makuhita	Machine
Hariyama	Machine
Sableye	Machine
Meditite	Machine
Medicham	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Ambipom	Machine
Buneary	Machine
Lopunny	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Weavile	Machine
Electivire	Machine
Magmortar	Machine
Gallade	Machine

Sword and Shield: 73 species

Species	Method	Level
Hitmonlee	Level up, Machine	1
Machop	Level up, Machine	12
Machoke	Level up, Machine	12
Machamp	Level up, Machine	12
Pancham	Level up, Machine	16
Pangoro	Level up, Machine	16
Sawk	Level up, Machine	20
Golduck	Machine
Poliwrath	Machine
Hitmonchan	Machine
Electabuzz	Machine
Magmar	Machine
Mewtwo	Machine
Mew	Machine
Sneasel	Machine
Tyrogue	Machine
Hitmontop	Machine
Grovyle	Machine
Sceptile	Machine
Combusken	Machine
Blaziken	Machine
Nuzleaf	Machine
Shiftry	Machine
Sableye	Machine
Buneary	Machine
Lopunny	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Weavile	Machine
Electivire	Machine
Magmortar	Machine
Gallade	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Throh	Machine
Krokorok	Machine
Krookodile	Machine
Scraggy	Machine
Scrafty	Machine
Zoroark	Machine
Gothitelle	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Helioptile	Machine
Heliolisk	Machine
Hawlucha	Machine
Decidueye	Machine
Incineroar	Machine
Mudbray	Machine
Mudsdale	Machine
Lurantis	Machine
Stufful	Machine
Bewear	Machine
Steenee	Machine
Tsareena	Machine
Passimian	Machine
Buzzwole	Machine
Pheromosa	Machine
Marshadow	Machine
Zeraora	Machine
Scorbunny	Machine
Raboot	Machine
Cinderace	Machine
Grimmsnarl	Machine
Kubfu	Machine
Urshifu	Machine

Ultra Sun and Ultra Moon: 96 species

Species	Method	Level
Pangoro	Level up, Machine	1, 57
Sawk	Level up, Machine	9
Machop	Level up, Machine	13
Machoke	Level up, Machine	13
Machamp	Level up, Machine	13
Golduck	Machine
Mankey	Machine
Primeape	Machine
Poliwrath	Machine
Drowzee	Machine
Hypno	Machine
Hitmonlee	Machine
Hitmonchan	Machine
Electabuzz	Machine
Magmar	Machine
Mewtwo	Machine
Mew	Machine
Aipom	Machine
Sneasel	Machine
Tyrogue	Machine
Hitmontop	Machine
Grovyle	Machine
Sceptile	Machine
Combusken	Machine
Blaziken	Machine
Nuzleaf	Machine
Shiftry	Machine
Breloom	Machine
Vigoroth	Machine
Slaking	Machine
Makuhita	Machine
Hariyama	Machine
Sableye	Machine
Meditite	Machine
Medicham	Machine
Deoxys	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Ambipom	Machine
Lopunny	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Weavile	Machine
Electivire	Machine
Magmortar	Machine
Gallade	Machine
Pignite	Machine
Emboar	Machine
Pansage	Machine
Simisage	Machine
Pansear	Machine
Simisear	Machine
Panpour	Machine
Simipour	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Throh	Machine
Krokorok	Machine
Krookodile	Machine
Scraggy	Machine
Scrafty	Machine
Zoroark	Machine
Gothitelle	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Meloetta	Machine
Chespin	Machine
Quilladin	Machine
Chesnaught	Machine
Pancham	Machine
Helioptile	Machine
Heliolisk	Machine
Hawlucha	Machine
Decidueye	Machine
Incineroar	Machine
Mudbray	Machine
Mudsdale	Machine
Lurantis	Machine
Stufful	Machine
Bewear	Machine
Steenee	Machine
Tsareena	Machine
Passimian	Machine
Komala	Machine
Buzzwole	Machine
Pheromosa	Machine
Marshadow	Machine
Zeraora	Machine

Sun and Moon: 95 species

Species	Method	Level
Pangoro	Level up, Machine	1, 57
Sawk	Level up, Machine	9
Machop	Level up, Machine	13
Machoke	Level up, Machine	13
Machamp	Level up, Machine	13
Golduck	Machine
Mankey	Machine
Primeape	Machine
Poliwrath	Machine
Drowzee	Machine
Hypno	Machine
Hitmonlee	Machine
Hitmonchan	Machine
Electabuzz	Machine
Magmar	Machine
Mewtwo	Machine
Mew	Machine
Aipom	Machine
Sneasel	Machine
Tyrogue	Machine
Hitmontop	Machine
Grovyle	Machine
Sceptile	Machine
Combusken	Machine
Blaziken	Machine
Nuzleaf	Machine
Shiftry	Machine
Breloom	Machine
Vigoroth	Machine
Slaking	Machine
Makuhita	Machine
Hariyama	Machine
Sableye	Machine
Meditite	Machine
Medicham	Machine
Deoxys	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Ambipom	Machine
Lopunny	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Weavile	Machine
Electivire	Machine
Magmortar	Machine
Gallade	Machine
Pignite	Machine
Emboar	Machine
Pansage	Machine
Simisage	Machine
Pansear	Machine
Simisear	Machine
Panpour	Machine
Simipour	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Throh	Machine
Krokorok	Machine
Krookodile	Machine
Scraggy	Machine
Scrafty	Machine
Zoroark	Machine
Gothitelle	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Meloetta	Machine
Chespin	Machine
Quilladin	Machine
Chesnaught	Machine
Pancham	Machine
Helioptile	Machine
Heliolisk	Machine
Hawlucha	Machine
Decidueye	Machine
Incineroar	Machine
Mudbray	Machine
Mudsdale	Machine
Lurantis	Machine
Stufful	Machine
Bewear	Machine
Steenee	Machine
Tsareena	Machine
Passimian	Machine
Komala	Machine
Buzzwole	Machine
Pheromosa	Machine
Marshadow	Machine

Omega Ruby and Alpha Sapphire: 81 species

Species	Method	Level
Machop	Level up, Machine	13
Machoke	Level up, Machine	13
Machamp	Level up, Machine	13
Sawk	Level up, Machine	17
Pangoro	Level up, Machine	70
Golduck	Machine
Mankey	Machine
Primeape	Machine
Poliwrath	Machine
Drowzee	Machine
Hypno	Machine
Hitmonlee	Machine
Hitmonchan	Machine
Electabuzz	Machine
Magmar	Machine
Mewtwo	Machine
Mew	Machine
Aipom	Machine
Sneasel	Machine
Tyrogue	Machine
Hitmontop	Machine
Grovyle	Machine
Sceptile	Machine
Combusken	Machine
Blaziken	Machine
Nuzleaf	Machine
Shiftry	Machine
Breloom	Machine
Vigoroth	Machine
Slaking	Machine
Makuhita	Machine
Hariyama	Machine
Sableye	Machine
Meditite	Machine
Medicham	Machine
Deoxys	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Ambipom	Machine
Lopunny	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Weavile	Machine
Electivire	Machine
Magmortar	Machine
Gallade	Machine
Pignite	Machine
Emboar	Machine
Pansage	Machine
Simisage	Machine
Pansear	Machine
Simisear	Machine
Panpour	Machine
Simipour	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Throh	Machine
Krokorok	Machine
Krookodile	Machine
Scraggy	Machine
Scrafty	Machine
Zoroark	Machine
Gothitelle	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Meloetta	Machine
Chespin	Machine
Quilladin	Machine
Chesnaught	Machine
Pancham	Machine
Helioptile	Machine
Heliolisk	Machine
Hawlucha	Machine

Changed over time

One change since Generation V

1. Through Gen VPower 6065 from X and Y, Generation VI