The Pokémon cannot be knocked out by a single hit as long as its HP is full. One-hit KO moves will also fail to knock it out.
Effect
When this Pokémon is at full HP, any hit that would knock it out will instead leave it with 1 HP. Regardless of its current HP, it is also immune to the one-hit KO moves: fissure, guillotine, horn drill, and sheer cold. If this Pokémon is holding a focus sash, this ability takes precedence and the item will not be consumed.
Pokémon with this ability (47)
#074
Geodude
#075
Graveler
#076
Golem
#081
Magnemite
#082
Magneton
#095
Onix
#185
Sudowoodo
#204
Pineco
#205
Forretress
#208
Steelix
#213
Shuckle
#227
Skarmory
#232
Donphan
#299
Nosepass
#304
Aron
#305
Lairon
#306
Aggron
#369
Relicanth
#377
Regirock
#410
Shieldon
#411
Bastiodon
#438
Bonsly
#462
Magnezone
#476
Probopass
#524
Roggenrola
#525
Boldore
#526
Gigalith
#539
Sawk
#557
Dwebble
#558
Crustle
#564
Tirtouga
#565
Carracosta
#696
Tyrunt
#703
Carbink
#712
Bergmite
#713
Avalugg
#777
Togedemaru
#790
Cosmoem
#932
Nacli
#933
Naclstack
#934
Garganacl
#1018
Archaludon
#074
Geodude
Alola
#075
Graveler
Alola
#076
Golem
Alola
#713
Avalugg
Hisui
#10275
Ogerpon
Cornerstone Mask