Rattled (ability)

Effect

When a Pokémon with Rattled is hit by a Bug, Ghost or Dark type move, its Speed is raised one stage (up to the usual maximum of +6 stages).

Game descriptions

Black​/​White
Black 2​/​White 2
Some move types scare it and boost its Speed.
X​/​Y
O.Ruby​/​A.Sapphire
Some move types scare it and boost its Speed stat.
Sun​/​Moon
Ultra Sun​/​Ultra Moon
Dark-, Ghost-, and Bug-type moves scare the Pokémon and boost its Speed stat.

Pokémon with Rattled

No Pokémon have the ability Rattled through regular play.

Rattled as a hidden ability