Every ability

Insomnia

This Pokémon cannot fall asleep. Gaining this Ability while asleep cures it.

Standard ability
14
Pokémon
Hidden ability
3
Pokémon
Only in battle
1
Pokémon

Pokémon that can have it

18

Standard ability14Any one caught or hatched may have it

Hidden ability3Only one with its hidden ability has it

Only in battle1A forme it takes mid-battle, like a Mega Evolution