Learnt by Level Up

These Pokémon learn Megahorn at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Nidoking	43	poison ground
Rapidash	1	fire
Rhyhorn	57	ground rock
Rhydon	66	ground rock
Goldeen	57	water
Seaking	69	water
Heracross	54	bug fighting
Rhyperior	57	ground rock
Samurott	1	water
Scolipede	1	bug poison
Sawsbuck	1	normal grass
Bouffalant	41	normal
Xerneas	44	fairy
Tapu Bulu	53	grass fairy
Falinks	55	fighting
Wyrdeer	62	normal psychic
Clodsire	36	poison ground
Great Tusk	77	ground fighting
Iron Treads	77	ground steel
Iron Leaves	77	grass psychic
Heracross Mega	46	bug fighting
Rapidash Galar	1	psychic fairy
Samurott Hisui	1	water dark

Learnt through Breeding (Egg Moves)

These Pokémon learn Megahorn through Breeding (Egg Moves) at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Spinarak	0	bug poison
Stantler	0	normal
Absol	0	dark
Karrablast	0	bug
Absol Mega	0	dark

Learnt by Technical Machines (TMs)

These Pokémon learn Megahorn by Technical Machines the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Seel	0	water
Dewgong	0	water ice
Tauros	0	normal
Lapras	0	water ice
Mew	0	psychic
Escavalier	0	bug steel
Cobalion	0	steel fighting
Terrakion	0	rock fighting
Virizion	0	grass fighting
Keldeo Ordinary	0	water fighting
Celesteela	0	steel flying
Drednaw	0	water rock
Glastrier	0	ice
Keldeo Resolute	0	water fighting
Calyrex Ice	0	psychic ice