Grass Knot is learned by 5 species by level and 325 by machine

Effect, in PokéAPI's words

“Inflicts more damage to heavier targets, with a maximum of 120 power.”

Who learns it

325 species in all, 3 of 12 games shown

Scarlet and Violet: 229 species

Species	Method	Level
Florges	Level up, Machine	1
Comfey	Level up, Machine	24
Zarude	Level up, Machine	36
Bulbasaur	Machine
Ivysaur	Machine
Venusaur	Machine
Pikachu	Machine
Raichu	Machine
Clefairy	Machine
Clefable	Machine
Jigglypuff	Machine
Wigglytuff	Machine
Oddish	Machine
Gloom	Machine
Vileplume	Machine
Golduck	Machine
Bellsprout	Machine
Weepinbell	Machine
Victreebel	Machine
Slowpoke	Machine
Slowbro	Machine
Drowzee	Machine
Hypno	Machine
Exeggcute	Machine
Exeggutor	Machine
Chansey	Machine
Mewtwo	Machine
Mew	Machine
Chikorita	Machine
Bayleef	Machine
Meganium	Machine
Sentret	Machine
Furret	Machine
Pichu	Machine
Cleffa	Machine
Igglybuff	Machine
Bellossom	Machine
Marill	Machine
Azumarill	Machine
Sudowoodo	Machine
Hoppip	Machine
Skiploom	Machine
Jumpluff	Machine
Aipom	Machine
Sunkern	Machine
Sunflora	Machine
Espeon	Machine
Slowking	Machine
Misdreavus	Machine
Girafarig	Machine
Blissey	Machine
Treecko	Machine
Grovyle	Machine
Sceptile	Machine
Lotad	Machine
Lombre	Machine
Ludicolo	Machine
Seedot	Machine
Nuzleaf	Machine
Shiftry	Machine
Ralts	Machine
Kirlia	Machine
Gardevoir	Machine
Shroomish	Machine
Breloom	Machine
Meditite	Machine
Medicham	Machine
Plusle	Machine
Minun	Machine
Spoink	Machine
Grumpig	Machine
Cacnea	Machine
Cacturne	Machine
Zangoose	Machine
Tropius	Machine
Chimecho	Machine
Metang	Machine
Metagross	Machine
Latias	Machine
Latios	Machine
Jirachi	Machine
Deoxys	Machine
Turtwig	Machine
Grotle	Machine
Torterra	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Piplup	Machine
Prinplup	Machine
Empoleon	Machine
Pachirisu	Machine
Ambipom	Machine
Mismagius	Machine
Chingling	Machine
Bronzor	Machine
Bronzong	Machine
Bonsly	Machine
Happiny	Machine
Snover	Machine
Abomasnow	Machine
Leafeon	Machine
Gallade	Machine
Uxie	Machine
Mesprit	Machine
Azelf	Machine
Cresselia	Machine
Phione	Machine
Manaphy	Machine
Shaymin	Machine
Arceus	Machine
Snivy	Machine
Servine	Machine
Serperior	Machine
Tepig	Machine
Pignite	Machine
Emboar	Machine
Oshawott	Machine
Dewott	Machine
Samurott	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Sewaddle	Machine
Swadloon	Machine
Leavanny	Machine
Cottonee	Machine
Whimsicott	Machine
Petilil	Machine
Lilligant	Machine
Sandile	Machine
Krokorok	Machine
Krookodile	Machine
Scraggy	Machine
Scrafty	Machine
Zorua	Machine
Zoroark	Machine
Minccino	Machine
Cinccino	Machine
Gothita	Machine
Gothorita	Machine
Gothitelle	Machine
Reuniclus	Machine
Deerling	Machine
Sawsbuck	Machine
Foongus	Machine
Amoonguss	Machine
Eelektross	Machine
Haxorus	Machine
Cubchoo	Machine
Beartic	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Virizion	Machine
Tornadus	Machine
Thundurus	Machine
Landorus	Machine
Meloetta	Machine
Chespin	Machine
Quilladin	Machine
Chesnaught	Machine
Fennekin	Machine
Braixen	Machine
Delphox	Machine
Froakie	Machine
Frogadier	Machine
Greninja	Machine
Flabébé	Machine
Floette	Machine
Skiddo	Machine
Gogoat	Machine
Hawlucha	Machine
Dedenne	Machine
Phantump	Machine
Trevenant	Machine
Hoopa	Machine
Rowlet	Machine
Dartrix	Machine
Decidueye	Machine
Cutiefly	Machine
Ribombee	Machine
Fomantis	Machine
Lurantis	Machine
Bounsweet	Machine
Steenee	Machine
Tsareena	Machine
Passimian	Machine
Magearna	Machine
Grookey	Machine
Thwackey	Machine
Rillaboom	Machine
Flapple	Machine
Appletun	Machine
Calyrex	Machine
Sneasler	Machine
Enamorus	Machine
Sprigatito	Machine
Floragato	Machine
Meowscarada	Machine
Tarountula	Machine
Spidops	Machine
Pawmot	Machine
Tandemaus	Machine
Maushold	Machine
Smoliv	Machine
Dolliv	Machine
Arboliva	Machine
Bramblin	Machine
Brambleghast	Machine
Toedscool	Machine
Toedscruel	Machine
Capsakid	Machine
Scovillain	Machine
Palafin	Machine
Farigiraf	Machine
Kingambit	Machine
Scream Tail	Machine
Brute Bonnet	Machine
Wo-Chien	Machine
Iron Valiant	Machine
Iron Leaves	Machine
Dipplin	Machine
Munkidori	Machine
Ogerpon	Machine
Hydrapple	Machine

Brilliant Diamond and Shining Pearl: 141 species

Species	Method	Level
Carnivine	Level up, Machine	27
Bulbasaur	Machine
Ivysaur	Machine
Venusaur	Machine
Rattata	Machine
Raticate	Machine
Pikachu	Machine
Raichu	Machine
Clefairy	Machine
Clefable	Machine
Jigglypuff	Machine
Wigglytuff	Machine
Oddish	Machine
Gloom	Machine
Vileplume	Machine
Paras	Machine
Parasect	Machine
Abra	Machine
Kadabra	Machine
Alakazam	Machine
Bellsprout	Machine
Weepinbell	Machine
Victreebel	Machine
Slowpoke	Machine
Slowbro	Machine
Drowzee	Machine
Hypno	Machine
Exeggcute	Machine
Exeggutor	Machine
Chansey	Machine
Tangela	Machine
Starmie	Machine
Mr. Mime	Machine
Jynx	Machine
Mewtwo	Machine
Mew	Machine
Chikorita	Machine
Bayleef	Machine
Meganium	Machine
Sentret	Machine
Furret	Machine
Pichu	Machine
Cleffa	Machine
Igglybuff	Machine
Togepi	Machine
Togetic	Machine
Natu	Machine
Xatu	Machine
Bellossom	Machine
Marill	Machine
Azumarill	Machine
Hoppip	Machine
Skiploom	Machine
Jumpluff	Machine
Aipom	Machine
Sunkern	Machine
Sunflora	Machine
Espeon	Machine
Slowking	Machine
Girafarig	Machine
Smoochum	Machine
Blissey	Machine
Celebi	Machine
Treecko	Machine
Grovyle	Machine
Sceptile	Machine
Zigzagoon	Machine
Linoone	Machine
Lotad	Machine
Lombre	Machine
Ludicolo	Machine
Seedot	Machine
Nuzleaf	Machine
Shiftry	Machine
Ralts	Machine
Kirlia	Machine
Gardevoir	Machine
Shroomish	Machine
Breloom	Machine
Skitty	Machine
Delcatty	Machine
Mawile	Machine
Meditite	Machine
Medicham	Machine
Plusle	Machine
Minun	Machine
Roselia	Machine
Spoink	Machine
Grumpig	Machine
Cacnea	Machine
Cacturne	Machine
Lunatone	Machine
Solrock	Machine
Baltoy	Machine
Claydol	Machine
Lileep	Machine
Cradily	Machine
Kecleon	Machine
Tropius	Machine
Chimecho	Machine
Metang	Machine
Metagross	Machine
Latias	Machine
Latios	Machine
Jirachi	Machine
Turtwig	Machine
Grotle	Machine
Torterra	Machine
Chimchar	Machine
Monferno	Machine
Infernape	Machine
Piplup	Machine
Prinplup	Machine
Empoleon	Machine
Bidoof	Machine
Bibarel	Machine
Budew	Machine
Roserade	Machine
Wormadam	Machine
Pachirisu	Machine
Cherubi	Machine
Cherrim	Machine
Ambipom	Machine
Buneary	Machine
Lopunny	Machine
Chingling	Machine
Bronzor	Machine
Bronzong	Machine
Mime Jr.	Machine
Happiny	Machine
Snover	Machine
Abomasnow	Machine
Tangrowth	Machine
Togekiss	Machine
Leafeon	Machine
Gallade	Machine
Uxie	Machine
Mesprit	Machine
Azelf	Machine
Cresselia	Machine
Manaphy	Machine

Sword and Shield: 188 species

Species	Method	Level
Comfey	Level up, Machine	24
Zarude	Level up, Machine	36
Bulbasaur	Machine
Ivysaur	Machine
Venusaur	Machine
Pikachu	Machine
Raichu	Machine
Clefairy	Machine
Clefable	Machine
Jigglypuff	Machine
Wigglytuff	Machine
Oddish	Machine
Gloom	Machine
Vileplume	Machine
Abra	Machine
Kadabra	Machine
Alakazam	Machine
Slowpoke	Machine
Slowbro	Machine
Exeggcute	Machine
Exeggutor	Machine
Chansey	Machine
Tangela	Machine
Starmie	Machine
Mr. Mime	Machine
Jynx	Machine
Mewtwo	Machine
Mew	Machine
Pichu	Machine
Cleffa	Machine
Igglybuff	Machine
Togepi	Machine
Togetic	Machine
Natu	Machine
Xatu	Machine
Bellossom	Machine
Marill	Machine
Azumarill	Machine
Espeon	Machine
Slowking	Machine
Smoochum	Machine
Blissey	Machine
Celebi	Machine
Treecko	Machine
Grovyle	Machine
Sceptile	Machine
Zigzagoon	Machine
Linoone	Machine
Lotad	Machine
Lombre	Machine
Ludicolo	Machine
Seedot	Machine
Nuzleaf	Machine
Shiftry	Machine
Ralts	Machine
Kirlia	Machine
Gardevoir	Machine
Mawile	Machine
Roselia	Machine
Lunatone	Machine
Solrock	Machine
Baltoy	Machine
Claydol	Machine
Lileep	Machine
Cradily	Machine
Metang	Machine
Metagross	Machine
Latias	Machine
Latios	Machine
Jirachi	Machine
Budew	Machine
Roserade	Machine
Cherubi	Machine
Cherrim	Machine
Buneary	Machine
Lopunny	Machine
Bronzor	Machine
Bronzong	Machine
Mime Jr.	Machine
Happiny	Machine
Snover	Machine
Abomasnow	Machine
Tangrowth	Machine
Togekiss	Machine
Leafeon	Machine
Gallade	Machine
Uxie	Machine
Mesprit	Machine
Azelf	Machine
Cresselia	Machine
Victini	Machine
Purrloin	Machine
Liepard	Machine
Audino	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Seismitoad	Machine
Throh	Machine
Sawk	Machine
Cottonee	Machine
Whimsicott	Machine
Petilil	Machine
Lilligant	Machine
Krokorok	Machine
Krookodile	Machine
Darumaka	Machine
Darmanitan	Machine
Maractus	Machine
Scraggy	Machine
Scrafty	Machine
Cofagrigus	Machine
Zorua	Machine
Zoroark	Machine
Minccino	Machine
Cinccino	Machine
Gothita	Machine
Gothorita	Machine
Gothitelle	Machine
Reuniclus	Machine
Foongus	Machine
Amoonguss	Machine
Ferrothorn	Machine
Haxorus	Machine
Cubchoo	Machine
Beartic	Machine
Mienfoo	Machine
Mienshao	Machine
Golett	Machine
Golurk	Machine
Pawniard	Machine
Bisharp	Machine
Virizion	Machine
Tornadus	Machine
Thundurus	Machine
Landorus	Machine
Bunnelby	Machine
Diggersby	Machine
Pancham	Machine
Pangoro	Machine
Binacle	Machine
Barbaracle	Machine
Helioptile	Machine
Heliolisk	Machine
Hawlucha	Machine
Dedenne	Machine
Phantump	Machine
Trevenant	Machine
Pumpkaboo	Machine
Gourgeist	Machine
Xerneas	Machine
Zygarde	Machine
Rowlet	Machine
Dartrix	Machine
Decidueye	Machine
Fomantis	Machine
Lurantis	Machine
Morelull	Machine
Shiinotic	Machine
Bounsweet	Machine
Steenee	Machine
Tsareena	Machine
Passimian	Machine
Togedemaru	Machine
Drampa	Machine
Dhelmise	Machine
Tapu Koko	Machine
Tapu Lele	Machine
Tapu Bulu	Machine
Tapu Fini	Machine
Nihilego	Machine
Xurkitree	Machine
Celesteela	Machine
Magearna	Machine
Marshadow	Machine
Zeraora	Machine
Grookey	Machine
Thwackey	Machine
Rillaboom	Machine
Thievul	Machine
Gossifleur	Machine
Eldegoss	Machine
Flapple	Machine
Appletun	Machine
Obstagoon	Machine
Mr. Rime	Machine
Runerigus	Machine
Calyrex	Machine