Insomnia

Insomnia is an ability in the Pokémon games that prevents the Pokémon with this ability from falling asleep. This includes sleep induced by moves such as Sleep Powder, Spore, Hypnosis, and Yawn, as well as the self-inflicted sleep from Rest. As a result, Pokémon with Insomnia are immune to one of the major status conditions, which can be a critical advantage in both competitive and casual play.

Effects: 1. Prevention of Sleep: Insomnia ensures that the Pokémon cannot be put to sleep by any move or effect. This includes the moves mentioned earlier and various abilities or effects that would otherwise cause sleep. 2. Rest Immunity: When a Pokémon with Insomnia uses the move Rest, the move will fail completely, since Rest requires the Pokémon to fall asleep to restore HP. 3. Spore Vulnerability: While immune to sleep-inducing moves, Pokémon with Insomnia can still be affected by other status conditions like Poison, Paralysis

Effects

This Pokémon cannot be asleep. This causes rest to fail altogether. If a Pokémon is asleep and acquires this ability, it will immediately wake up; this includes when regaining a lost ability upon leaving battle. This ability functions identically to vital spirit in battle.

Flavor Texts

ruby-sapphire: Prevents sleep.
emerald: Prevents sleep.
firered-leafgreen: Prevents sleep.
diamond-pearl: Prevents the Pokémon from falling asleep.
platinum: Prevents the Pokémon from falling asleep.
heartgold-soulsilver: Prevents the Pokémon from falling asleep.
black-white: Prevents the Pokémon from falling asleep.
black-2-white-2: Prevents the Pokémon from falling asleep.
x-y: Prevents the Pokémon from falling asleep.
omega-ruby-alpha-sapphire: Prevents the Pokémon from falling asleep.
sun-moon: The Pokémon is suffering from insomnia and cannot fall asleep.
ultra-sun-ultra-moon: The Pokémon is suffering from insomnia and cannot fall asleep.
lets-go-pikachu-lets-go-eevee: The Pokémon is suffering from insomnia and cannot fall asleep.
sword-shield: The Pokémon is suffering from insomnia and cannot fall asleep.
sword-shield: The Pokémon's insomnia prevents it from falling asleep.