When a Pokémon with Weak Armor is hit by a physical move, its Defense drops by one stage, but its Speed increases by two stages (starting in Generation 7).
Stats can be raised to a maximum of +6 stages each or lowered to a minimum of -6 stages each.
Weak Armor
The Pokémon’s Defense stat is lowered when it takes damage from physical moves, but its Speed stat is sharply boosted.
Pokémon with the Weak Armor ability
#569
Gigantamax Garbodor
poison
HP: 80 Atk: 95 Def: 82
Sp.Atk: 60 Sp.Def: 82 Speed: 75
Total: 474
#222
Galarian Form
ghost
HP: 60 Atk: 55 Def: 100
Sp.Atk: 65 Sp.Def: 100 Speed: 30
Total: 410
#854
Antique Form
ghost
HP: 40 Atk: 45 Def: 45
Sp.Atk: 74 Sp.Def: 54 Speed: 50
Total: 308
#855
Antique Form
ghost
HP: 60 Atk: 65 Def: 65
Sp.Atk: 134 Sp.Def: 114 Speed: 70
Total: 508
#524
Roggenrola
rock
HP: 55 Atk: 75 Def: 85
Sp.Atk: 25 Sp.Def: 25 Speed: 15
Total: 280
#525
Boldore
rock
HP: 70 Atk: 105 Def: 105
Sp.Atk: 50 Sp.Def: 40 Speed: 20
Total: 390
#569
Garbodor
poison
HP: 80 Atk: 95 Def: 82
Sp.Atk: 60 Sp.Def: 82 Speed: 75
Total: 474
#854
Sinistea
ghost
HP: 40 Atk: 45 Def: 45
Sp.Atk: 74 Sp.Def: 54 Speed: 50
Total: 308
#855
Polteageist
ghost
HP: 60 Atk: 65 Def: 65
Sp.Atk: 134 Sp.Def: 114 Speed: 70
Total: 508
#864
Cursola
ghost
HP: 60 Atk: 95 Def: 50
Sp.Atk: 145 Sp.Def: 130 Speed: 30
Total: 510
#95
Onix
rock
ground
HP: 35 Atk: 45 Def: 160
Sp.Atk: 30 Sp.Def: 45 Speed: 70
Total: 385
#138
Omanyte
rock
water
HP: 35 Atk: 40 Def: 100
Sp.Atk: 90 Sp.Def: 55 Speed: 35
Total: 355
#139
Omastar
rock
water
HP: 70 Atk: 60 Def: 125
Sp.Atk: 115 Sp.Def: 70 Speed: 55
Total: 495
#140
Kabuto
rock
water
HP: 30 Atk: 80 Def: 90
Sp.Atk: 55 Sp.Def: 45 Speed: 55
Total: 355
#141
Kabutops
rock
water
HP: 60 Atk: 115 Def: 105
Sp.Atk: 65 Sp.Def: 70 Speed: 80
Total: 495
#218
Slugma
fire
HP: 40 Atk: 40 Def: 40
Sp.Atk: 70 Sp.Def: 40 Speed: 20
Total: 250
#219
Magcargo
fire
rock
HP: 60 Atk: 50 Def: 120
Sp.Atk: 90 Sp.Def: 80 Speed: 30
Total: 430
#227
Skarmory
steel
flying
HP: 65 Atk: 80 Def: 140
Sp.Atk: 40 Sp.Def: 70 Speed: 70
Total: 465
#557
Dwebble
bug
rock
HP: 50 Atk: 65 Def: 85
Sp.Atk: 35 Sp.Def: 35 Speed: 55
Total: 325
#558
Crustle
bug
rock
HP: 70 Atk: 105 Def: 125
Sp.Atk: 65 Sp.Def: 75 Speed: 45
Total: 485
#582
Vanillite
ice
HP: 36 Atk: 50 Def: 50
Sp.Atk: 65 Sp.Def: 60 Speed: 44
Total: 305
#583
Vanillish
ice
HP: 51 Atk: 65 Def: 65
Sp.Atk: 80 Sp.Def: 75 Speed: 59
Total: 395
#584
Vanilluxe
ice
HP: 71 Atk: 95 Def: 85
Sp.Atk: 110 Sp.Def: 95 Speed: 79
Total: 535
#629
Vullaby
dark
flying
HP: 70 Atk: 55 Def: 75
Sp.Atk: 45 Sp.Def: 65 Speed: 60
Total: 370
#630
Mandibuzz
dark
flying
HP: 110 Atk: 65 Def: 105
Sp.Atk: 55 Sp.Def: 95 Speed: 80
Total: 510
#936
Armarouge
fire
psychic
HP: 85 Atk: 60 Def: 100
Sp.Atk: 125 Sp.Def: 80 Speed: 75
Total: 525
#937
Ceruledge
fire
ghost
HP: 75 Atk: 125 Def: 80
Sp.Atk: 60 Sp.Def: 100 Speed: 85
Total: 525