Coaching is learned by 49 species by machine and 49 by tutor

Effect, in PokéAPI's words

“Raises the target's Attack and Defense by 1 stage. Fails if there is no ally adjacent to the user.”

Who learns it

66 species in all, 2 games

Scarlet and Violet: 49 species

Species	Method	Level
Poliwrath	Machine
Hitmonlee	Machine
Hitmonchan	Machine
Mew	Machine
Heracross	Machine
Hitmontop	Machine
Combusken	Machine
Blaziken	Machine
Makuhita	Machine
Hariyama	Machine
Infernape	Machine
Riolu	Machine
Lucario	Machine
Croagunk	Machine
Toxicroak	Machine
Gallade	Machine
Pignite	Machine
Emboar	Machine
Timburr	Machine
Gurdurr	Machine
Conkeldurr	Machine
Scraggy	Machine
Scrafty	Machine
Mienfoo	Machine
Mienshao	Machine
Cobalion	Machine
Terrakion	Machine
Virizion	Machine
Keldeo	Machine
Meloetta	Machine
Chesnaught	Machine
Hawlucha	Machine
Decidueye	Machine
Crabrawler	Machine
Crabominable	Machine
Passimian	Machine
Hakamo-o	Machine
Kommo-o	Machine
Cinderace	Machine
Falinks	Machine
Zamazenta	Machine
Urshifu	Machine
Sneasler	Machine
Quaquaval	Machine
Pawmo	Machine
Pawmot	Machine
Annihilape	Machine
Iron Valiant	Machine
Iron Leaves	Machine

Sword and Shield: 49 species

Species	Method	Level
Poliwrath	Tutor
Machop	Tutor
Machoke	Tutor
Machamp	Tutor
Hitmonlee	Tutor
Hitmonchan	Tutor
Mew	Tutor
Heracross	Tutor
Hitmontop	Tutor
Combusken	Tutor
Blaziken	Tutor
Riolu	Tutor
Lucario	Tutor
Croagunk	Tutor
Toxicroak	Tutor
Gallade	Tutor
Timburr	Tutor
Gurdurr	Tutor
Conkeldurr	Tutor
Throh	Tutor
Sawk	Tutor
Scraggy	Tutor
Scrafty	Tutor
Mienfoo	Tutor
Mienshao	Tutor
Cobalion	Tutor
Terrakion	Tutor
Virizion	Tutor
Keldeo	Tutor
Pancham	Tutor
Pangoro	Tutor
Hawlucha	Tutor
Stufful	Tutor
Bewear	Tutor
Passimian	Tutor
Hakamo-o	Tutor
Kommo-o	Tutor
Buzzwole	Tutor
Pheromosa	Tutor
Marshadow	Tutor
Zeraora	Tutor
Cinderace	Tutor
Clobbopus	Tutor
Grapploct	Tutor
Sirfetch’d	Tutor
Falinks	Tutor
Zamazenta	Tutor
Kubfu	Tutor
Urshifu	Tutor