Icicle Spear is learned by 5 species by level, 48 by machine and 5 by egg

Effect, in PokéAPI's words

“Hits 2-5 times in one turn.”

Who learns it

48 species in all, 8 of 15 games shown

Scarlet and Violet: 35 species

Species	Method	Level
Cloyster	Level up, Machine	Evolve
Seel	Machine
Dewgong	Machine
Shellder	Machine
Lapras	Machine
Articuno	Machine
Mew	Machine
Sneasel	Machine
Swinub	Machine
Piloswine	Machine
Delibird	Machine
Snorunt	Machine
Glalie	Machine
Regice	Machine
Snover	Machine
Abomasnow	Machine
Weavile	Machine
Glaceon	Machine
Mamoswine	Machine
Froslass	Machine
Cubchoo	Machine
Beartic	Machine
Cryogonal	Machine
Kyurem	Machine
Bergmite	Machine
Avalugg	Machine
Inteleon	Machine
Snom	Machine
Frosmoth	Machine
Eiscue	Machine
Cetoddle	Machine
Cetitan	Machine
Frigibax	Machine, Egg
Arctibax	Machine
Baxcalibur	Machine

Brilliant Diamond and Shining Pearl: 5 species

Species	Method	Level
Cloyster	Level up	Evolve, 1
Seel	Egg
Shellder	Egg
Swinub	Egg
Corsola	Egg

Sword and Shield: 36 species

Species	Method	Level
Cloyster	Level up, Machine	Evolve, 1
Vanillite	Level up, Machine	24
Vanillish	Level up, Machine	24
Vanilluxe	Level up, Machine	24
Shellder	Machine
Jynx	Machine
Articuno	Machine
Mew	Machine
Swinub	Machine
Piloswine	Machine
Corsola	Machine
Delibird	Machine
Glalie	Machine
Sealeo	Machine
Walrein	Machine
Regice	Machine
Abomasnow	Machine
Weavile	Machine
Glaceon	Machine
Mamoswine	Machine
Froslass	Machine
Beartic	Machine
Cryogonal	Machine
Kyurem	Machine
Aurorus	Machine
Bergmite	Machine
Avalugg	Machine
Inteleon	Machine
Cursola	Machine
Mr. Rime	Machine
Snom	Machine
Frosmoth	Machine
Eiscue	Machine
Arctozolt	Machine
Arctovish	Machine
Glastrier	Machine

Ultra Sun and Ultra Moon: 7 species

Species	Method	Level
Vanillite	Level up	1
Vanillish	Level up	1
Vanilluxe	Level up	1
Shellder	Level up, Egg	13
Seel	Egg
Swinub	Egg
Corsola	Egg

Sun and Moon: 7 species

Species	Method	Level
Vanillite	Level up	1
Vanillish	Level up	1
Vanilluxe	Level up	1
Shellder	Level up, Egg	13
Seel	Egg
Swinub	Egg
Corsola	Egg

Omega Ruby and Alpha Sapphire: 7 species

Species	Method	Level
Vanillite	Level up	1
Vanillish	Level up	1
Vanilluxe	Level up	1
Shellder	Level up, Egg	13
Seel	Egg
Swinub	Egg
Corsola	Egg

X and Y: 7 species

Species	Method	Level
Vanillite	Level up	1
Vanillish	Level up	1
Vanilluxe	Level up	1
Shellder	Level up, Egg	13
Seel	Egg
Swinub	Egg
Corsola	Egg

Black 2 and White 2: 7 species

Species	Method	Level
Vanillite	Level up	1
Vanillish	Level up	1
Vanilluxe	Level up	1
Shellder	Level up, Egg	13
Seel	Egg
Swinub	Egg
Corsola	Egg

Changed over time

One change since Generation III

1. Through Gen IVPower 1025 from Black and White, Generation V