Acupressure is learned by 10 species by level and 10 by egg

Effect, in PokéAPI's words

“Raises one of a friendly Pokémon’s stats at random by two stages.”

Who learns it

20 species in all, 8 of 12 games shown

Scarlet and Violet: 14 species

Species	Method	Level
Doduo	Level up	30
Dodrio	Level up	30
Meditite	Level up	33
Medicham	Level up	33
Qwilfish	Level up	52
Overqwil	Level up	52
Pincurchin	Level up	55
Tentacool	Egg
Tentacruel	Egg
Inkay	Egg
Malamar	Egg
Bounsweet	Egg
Arrokuda	Egg
Toedscool	Egg

Brilliant Diamond and Shining Pearl: 11 species

Species	Method	Level
Doduo	Level up	33
Meditite	Level up	33
Medicham	Level up	33
Dodrio	Level up	34
Skorupi	Level up	45
Drapion	Level up	49
Qwilfish	Level up	60
Tentacool	Egg
Goldeen	Egg
Shuckle	Egg
Croagunk	Egg

Sword and Shield: 11 species

Species	Method	Level
Skorupi	Level up	45
Drapion	Level up	49
Maractus	Level up	52
Pincurchin	Level up	55
Qwilfish	Level up	60
Tentacool	Egg
Goldeen	Egg
Shuckle	Egg
Inkay	Egg
Bounsweet	Egg
Arrokuda	Egg

Ultra Sun and Ultra Moon: 11 species

Species	Method	Level
Skorupi	Level up	13
Drapion	Level up	13
Maractus	Level up	29
Doduo	Level up	33
Meditite	Level up	33
Medicham	Level up	33
Dodrio	Level up	34
Tentacool	Egg
Shuckle	Egg
Croagunk	Egg
Bounsweet	Egg

Sun and Moon: 11 species

Species	Method	Level
Skorupi	Level up	13
Drapion	Level up	13
Maractus	Level up	29
Doduo	Level up	33
Meditite	Level up	33
Medicham	Level up	33
Dodrio	Level up	34
Tentacool	Egg
Shuckle	Egg
Croagunk	Egg
Bounsweet	Egg

Omega Ruby and Alpha Sapphire: 10 species

Species	Method	Level
Skorupi	Level up	13
Drapion	Level up	13
Doduo	Level up	29
Dodrio	Level up	29
Maractus	Level up	29
Meditite	Level up	33
Medicham	Level up	33
Tentacool	Egg
Shuckle	Egg
Croagunk	Egg

X and Y: 10 species

Species	Method	Level
Skorupi	Level up	13
Drapion	Level up	13
Doduo	Level up	28
Dodrio	Level up	28
Maractus	Level up	29
Meditite	Level up	39
Medicham	Level up	42
Tentacool	Egg
Shuckle	Egg
Croagunk	Egg

Black 2 and White 2: 10 species

Species	Method	Level
Skorupi	Level up	13
Drapion	Level up	13
Doduo	Level up	28
Dodrio	Level up	28
Maractus	Level up	29
Meditite	Level up	39
Medicham	Level up	42
Tentacool	Egg
Shuckle	Egg
Croagunk	Egg