Beat Up is learned by 14 species by level, 46 by machine and 17 by egg

Effect, in PokéAPI's words

“Hits once for every conscious Pokémon the trainer has.”

Who learns it

58 species in all, 8 of 19 games shown

Scarlet and Violet: 19 species

Species	Method	Level
Weavile	Level up	1
Passimian	Level up	15
Scraggy	Level up	24
Scrafty	Level up	24
Houndour	Level up	25
Houndoom	Level up	26
Tandemaus	Level up	37
Maushold	Level up	41
Sneasel	Level up	42
Fezandipiti	Level up	48
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Shiftry	Egg
Ambipom	Egg
Cottonee	Egg
Whimsicott	Egg
Bramblin	Egg
Brambleghast	Egg

Brilliant Diamond and Shining Pearl: 13 species

Species	Method	Level
Weavile	Level up	1
Houndour	Level up, Egg	25
Houndoom	Level up	26
Sneasel	Level up	42
Charmander	Egg
Ekans	Egg
Nidoran♀	Egg
Nidoran♂	Egg
Diglett	Egg
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Seedot	Egg

Sword and Shield: 46 species

Species	Method	Level
Weavile	Level up, Machine	1
Thievul	Level up, Machine	1
Nickit	Level up, Machine	4
Wishiwashi	Level up, Machine	8
Durant	Level up, Machine	12
Passimian	Level up, Machine	15
Scraggy	Level up, Machine	24
Scrafty	Level up, Machine	24
Sneasel	Level up, Machine	42
Charmander	Machine
Charmeleon	Machine
Charizard	Machine
Nidoran♀	Machine
Nidorina	Machine
Nidoqueen	Machine
Nidoran♂	Machine
Nidorino	Machine
Nidoking	Machine
Diglett	Machine
Dugtrio	Machine
Kangaskhan	Machine
Mew	Machine
Seedot	Machine
Nuzleaf	Machine
Shiftry	Machine
Vespiquen	Machine
Cottonee	Machine
Whimsicott	Machine
Sandile	Machine
Krokorok	Machine
Krookodile	Machine
Vanilluxe	Machine
Pawniard	Machine
Bisharp	Machine
Zweilous	Machine
Hydreigon	Machine
Pangoro	Machine
Binacle	Machine
Barbaracle	Machine
Salandit	Machine
Salazzle	Machine
Mimikyu	Machine
Falinks	Machine
Drakloak	Machine
Dragapult	Machine
Urshifu	Machine

Ultra Sun and Ultra Moon: 16 species

Species	Method	Level
Passimian	Level up	15
Houndour	Level up, Egg	25
Houndoom	Level up	26
Sneasel	Level up	28
Wishiwashi	Level up	33
Charmander	Egg
Ekans	Egg
Nidoran♀	Egg
Nidoran♂	Egg
Diglett	Egg
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Seedot	Egg
Cottonee	Egg
Sandile	Egg

Sun and Moon: 16 species

Species	Method	Level
Passimian	Level up	15
Houndour	Level up, Egg	25
Houndoom	Level up	26
Sneasel	Level up	28
Wishiwashi	Level up	33
Charmander	Egg
Ekans	Egg
Nidoran♀	Egg
Nidoran♂	Egg
Diglett	Egg
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Seedot	Egg
Cottonee	Egg
Sandile	Egg

Omega Ruby and Alpha Sapphire: 14 species

Species	Method	Level
Houndour	Level up, Egg	25
Houndoom	Level up	26
Sneasel	Level up	28
Charmander	Egg
Ekans	Egg
Nidoran♀	Egg
Nidoran♂	Egg
Diglett	Egg
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Seedot	Egg
Cottonee	Egg
Sandile	Egg

X and Y: 14 species

Species	Method	Level
Houndour	Level up, Egg	25
Houndoom	Level up	26
Sneasel	Level up	28
Charmander	Egg
Ekans	Egg
Nidoran♀	Egg
Nidoran♂	Egg
Diglett	Egg
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Seedot	Egg
Cottonee	Egg
Sandile	Egg

Black 2 and White 2: 14 species

Species	Method	Level
Houndour	Level up, Egg	25
Houndoom	Level up	26
Sneasel	Level up	28
Charmander	Egg
Ekans	Egg
Nidoran♀	Egg
Nidoran♂	Egg
Diglett	Egg
Mankey	Egg
Aipom	Egg
Girafarig	Egg
Seedot	Egg
Cottonee	Egg
Sandile	Egg

Changed over time

One change since Generation II

1. Through Gen IVPower 10Removed from Black and White, Generation V