The Pokémon's Defense stat is lowered when it takes damage from physical moves, but its Speed stat is sharply boosted.

Pokémon with Weak Armor

Pokémon with Weak Armor
#SpriteNameTypeHiddenHPATKDEFSpASpDSPETotal
095OnixOnixROCKGROUNDHidden3545160304570385
138OmanyteOmanyteROCKWATERHidden3540100905535355
139OmastarOmastarROCKWATERHidden70601251157055495
140KabutoKabutoROCKWATERHidden308090554555355
141KabutopsKabutopsROCKWATERHidden60115105657080495
218SlugmaSlugmaFIREHidden404040704020250
219MagcargoMagcargoFIREROCKHidden6050120908030430
227SkarmorySkarmorySTEELFLYINGHidden6580140407070465
524RoggenrolaRoggenrolaROCK557585252515280
525BoldoreBoldoreROCK70105105504020390
557DwebbleDwebbleBUGROCKHidden506585353555325
558CrustleCrustleBUGROCKHidden70105125657545485
569GarbodorGarbodorPOISON809582608275474
582VanilliteVanilliteICEHidden365050656044305
583VanillishVanillishICEHidden516565807559395
584VanilluxeVanilluxeICEHidden7195851109579535
629VullabyVullabyDARKFLYINGHidden705575456560370
630MandibuzzMandibuzzDARKFLYINGHidden11065105559580510
854SinisteaSinisteaGHOST404545745450308
855PolteageistPolteageistGHOST60656513411470508
864CursolaCursolaGHOST60955014513030510
936ArmarougeArmarougeFIREPSYCHCHidden85601001258075525
937CeruledgeCeruledgeFIREGHOSTHidden75125806010085525