Weak Armor (ability)

Effect

When a Pokémon with Weak Armor is hit by a physical move, its Defense drops one stage, but its Speed increases by one stage.

Game descriptions

Black​/​White
Black 2​/​White 2
Physical attacks lower Defense and raise Speed.
X​/​Y
O.Ruby​/​A.Sapphire
Physical attacks lower its Defense stat and raise its Speed stat.
Sun​/​Moon
Ultra Sun​/​Ultra Moon
Physical attacks to the Pokémon lower its Defense stat but sharply raise its Speed stat.

Other languages

English Weak Armor
Japanese くだけるよろい (Kudakeru Yoroi)
German Bruchrüstung
French Armurouillée
Italian Sottilguscio
Spanish Armadura Frágil