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.

Stats can be raised to a maximum of +6 stages each, or lowered to a minimum of -6 stages each.

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.
Sword​/​Shield
B.Diamond​/​S.Pearl
Physical attacks to the Pokémon lower its Defense stat but sharply raise its Speed stat.
Scarlet​/​Violet The Pokémon’s Defense stat is lowered when it takes damage from physical moves, but its Speed stat is sharply boosted.

Other languages

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