Insomnia

Description

The wielder cannot be put to sleep or be rendered drowsy via Yawn. Rest will fail when used by this Pokemon. If the wielder is sleeping, it is instantly cured of sleep. A Pokemon with Mold Breaker can target the wielder with Yawn and make it drowsy, but the wielder will fail to fall asleep (unless it no longer has Insomnia the next turn).

Competitive Use

Like Vital Spirit, Insomnia grants the wielder the ability to switch into sleep-inducing moves fearlessly. Banette and Honchkrow can take advantage of this fact to switch in and fire off powerful attacks, and the former can also Skill Swap its own Insomnia to screw over Rest users. Noctowl can become virtually immune to status with Psycho Shift in hand, and Hypno can wall special assaults all day long without fearing Hypnosis or Sleep Powder putting it to an early sleep.

Found normally

Pokémon	Type	Tier	Abilities	HP	Atk	Def	SpA	SpD	Spe	BST
Ariados	Bug / Poison	NU	Swarm / Insomnia / Sniper	70	90	70	60	60	40	390
Banette	Ghost	NU	Insomnia / Frisk / Cursed Body	64	115	65	83	63	65	455
Drowzee	Psychic	LC	Insomnia / Forewarn / Inner Focus	60	48	45	43	90	42	328
Honchkrow	Dark / Flying	UU	Insomnia / Super Luck / Moxie	100	125	52	105	52	71	505
Hoothoot	Normal / Flying	LC	Insomnia / Keen Eye / Tinted Lens	60	30	30	36	56	50	262
Hypno	Psychic	NU	Insomnia / Forewarn / Inner Focus	85	73	70	73	115	67	483
Murkrow	Dark / Flying	NU	Insomnia / Super Luck / Prankster	60	85	42	85	42	91	405
Noctowl	Normal / Flying	NU	Insomnia / Keen Eye / Tinted Lens	100	50	50	76	96	70	442
Shuppet	Ghost	LC	Insomnia / Frisk / Cursed Body	44	75	35	63	33	45	295
Spinarak	Bug / Poison	LC	Swarm / Insomnia / Sniper	40	60	40	40	40	30	250

Found in Dream World

Pokémon	Type	Tier	Abilities	HP	Atk	Def	SpA	SpD	Spe	BST
Delibird	Ice / Flying	NU	Vital Spirit / Hustle / Insomnia	45	55	45	65	45	75	330