Pokémon that can have the Thick Fat ability:

No.	Pic	Name	Type	Abilities	Base Stats
					HP	Att	Def	S.Att	S.Def	Spd
#003		Mega Venusaur		Thick Fat	80	100	123	122	120	80
#086		Seel		Thick Fat Hydration	65	45	55	45	70	45
#087		Dewgong		Thick Fat Hydration	90	70	80	70	95	70
#143		Snorlax		Immunity Thick Fat	160	110	65	65	110	30
#143		Snorlax		Immunity Thick Fat Gluttony	160	110	65	65	110	30
#183		Marill		Thick Fat Huge Power	70	20	50	20	50	40
#184		Azumarill		Thick Fat Huge Power	100	50	80	60	80	50
#241		Miltank		Thick Fat Scrappy	95	80	105	40	70	100
#296		Makuhita		Thick Fat Guts	72	60	30	20	30	25
#297		Hariyama		Thick Fat Guts	144	120	60	40	60	50
#298		Azurill		Thick Fat Huge Power	50	20	40	20	40	20
#325		Spoink		Thick Fat Own Tempo	60	25	35	70	80	60
#326		Grumpig		Thick Fat Own Tempo	80	45	65	90	110	80
#363		Spheal		Thick Fat Ice Body	70	40	50	55	50	25
#364		Sealeo		Thick Fat Ice Body	90	60	70	75	70	45
#365		Walrein		Thick Fat Ice Body	110	80	90	95	90	65
#432		Purugly		Thick Fat Own Tempo	71	82	64	64	59	112
#446		Munchlax		Pickup Thick Fat	135	85	40	40	85	5

Pokémon that can have the Thick Fat ability as their Hidden Ability:

No.	Pic	Name	Type	Abilities	Base Stats
					HP	Att	Def	S.Att	S.Def	Spd
#019		Rattata		Gluttony Hustle Thick Fat	30	56	35	25	35	72
#020		Raticate		Gluttony Hustle Thick Fat	75	71	70	40	80	77
#220		Swinub		Thick Fat	50	50	40	30	30	50
#221		Piloswine		Thick Fat	100	100	80	60	60	50
#473		Mamoswine		Thick Fat	110	130	80	70	60	80
#498		Tepig		Thick Fat	65	63	45	45	45	45
#499		Pignite		Thick Fat	90	93	55	70	55	55
#842		Appletun		Thick Fat	110	85	80	100	80	30
#842		Appletun		Ripen Gluttony Thick Fat	110	85	80	100	80	30