Pokémon that can have the Shell Armor ability:

No.	Pic	Name	Type	Abilities	Base Stats
					HP	Att	Def	S.Att	S.Def	Spd
#080		Mega Slowbro		Shell Armor	95	75	180	130	80	30
#090		Shellder		Shell Armor Skill Link	30	65	100	45	25	40
#091		Cloyster		Shell Armor Skill Link	50	95	180	85	45	70
#098		Krabby		Hyper Cutter Shell Armor	30	105	90	25	25	50
#099		Kingler		Hyper Cutter Shell Armor	55	130	115	50	50	75
#099		Kingler		Hyper Cutter Shell Armor Sheer Force	55	130	115	50	50	75
#131		Lapras		Water Absorb Shell Armor	130	85	80	85	95	60
#131		Lapras		Water Absorb Shell Armor Hydration	130	85	80	85	95	60
#138		Omanyte		Swift Swim Shell Armor	35	40	100	90	55	35
#139		Omastar		Swift Swim Shell Armor	70	60	125	115	70	55
#341		Corphish		Hyper Cutter Shell Armor	43	80	65	50	35	35
#342		Crawdaunt		Hyper Cutter Shell Armor	63	120	85	90	55	55
#366		Clamperl		Shell Armor	35	64	85	74	55	32
#557		Dwebble		Sturdy Shell Armor	50	65	85	35	35	55
#558		Crustle		Sturdy Shell Armor	70	105	125	65	75	45
#589		Escavalier		Swarm Shell Armor	70	135	105	60	105	20
#616		Shelmet		Hydration Shell Armor	50	40	85	40	65	25
#776		Turtonator		Shell Armor	60	78	135	91	85	36
#833		Chewtle		Strong Jaw Shell Armor	50	64	50	38	38	44
#834		Drednaw		Strong Jaw Shell Armor	90	115	90	48	68	74
#834		Drednaw		Strong Jaw Shell Armor Swift Swim	90	115	90	48	68	74

Pokémon that can have the Shell Armor ability as their Hidden Ability:

No.	Pic	Name	Type	Abilities	Base Stats
					HP	Att	Def	S.Att	S.Def	Spd
#080		Mega Slowbro		Shell Armor	95	75	180	130	80	30
#324		Torkoal		White Smoke Drought	70	85	140	85	70	20
#387		Turtwig		Overgrow	55	68	64	45	55	31
#388		Grotle		Overgrow	75	89	85	55	65	36
#389		Torterra		Overgrow	95	109	105	75	85	56
#501		Oshawott		Torrent	55	55	45	63	45	45
#502		Dewott		Torrent	75	75	60	83	60	60
#503		Samurott		Torrent	95	100	85	108	70	70
#776		Turtonator		Shell Armor	60	78	135	91	85	36