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Insomnia (Japanese: ふみん Insomnia) is an ability introduced in Generation III that prevents sleep. See also Vital Spirit. Ten Pokémon have this ability.

Pokémon with Insomnia

Single ability

As of Generation IV, no Pokémon have Insomnia as their only ability.

Dual ability

Drowzee	Hypno	Hoothoot	Noctowl	Spinarak
Forewarn	Forewarn	Keen Eye	Keen Eye	Swarm
Murkrow	Honchkrow	Shuppet	Banette	Ariados
Super Luck	Super Luck	Frisk	Frisk	Swarm