Present is learned by 2 species by level and 15 by egg

Effect, in PokéAPI's words

“Randomly inflicts damage with power from 40 to 120 or heals the target for 1/4 its max HP.”

Who learns it

17 species in all, 8 of 19 games shown

Scarlet and Violet: 13 species

Species	Method	Level
Delibird	Level up	1
Iron Bundle	Level up	1
Clefairy	Egg
Clefable	Egg
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Snubbull	Egg
Granbull	Egg
Blissey	Egg
Azurill	Egg
Happiny	Egg

Brilliant Diamond and Shining Pearl: 11 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Snubbull	Egg
Miltank	Egg
Azurill	Egg
Happiny	Egg

Sword and Shield: 11 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Miltank	Egg
Azurill	Egg
Happiny	Egg
Togedemaru	Egg

Ultra Sun and Ultra Moon: 11 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Snubbull	Egg
Miltank	Egg
Happiny	Egg
Togedemaru	Egg

Sun and Moon: 11 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Snubbull	Egg
Miltank	Egg
Happiny	Egg
Togedemaru	Egg

Omega Ruby and Alpha Sapphire: 10 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Snubbull	Egg
Miltank	Egg
Happiny	Egg

X and Y: 10 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Snubbull	Egg
Miltank	Egg
Happiny	Egg

Black 2 and White 2: 10 species

Species	Method	Level
Delibird	Level up	1
Chansey	Egg
Pichu	Egg
Cleffa	Egg
Igglybuff	Egg
Togepi	Egg
Marill	Egg
Snubbull	Egg
Miltank	Egg
Happiny	Egg