Thick Fat is an ability that was introduced in Generation III. It halves damage taken from Ice and Fire-type moves.



Pokédex Pokémon Sprite Type
#086 Seel 086 Type Water
#087 Dewgong 087 Type WaterType Ice
#143 Snorlax 143 Type Normal
#183 Marill 183 Type WaterType Fairy
#184 Azumarill 184 Type WaterType Fairy
#241 Miltank 241 Type Normal
#296 Makuhita 296 Type Fighting
#297 Hariyama 297 Type Fighting
#298 Azurill 298 Type NormalType Fairy
#325 Spoink 325 Type Psychic
#326 Grumpig 326 Type Psychic
#363 Spheal 363 Type IceType Water
#364 Sealeo 364 Type IceType Water
#365 Walrein 365 Type IceType Water
#432 Purugly 432 Type Normal
#446 Munchlax 446 Type Normal


Pokédex Pokémon Sprite Type
#220 Swinub 220 Type IceType Ground
#221 Piloswine 221 Type IceType Ground
#473 Mamoswine 473 Type IceType Ground
#498 Tepig 498 Type Fire
#499 Pignite 499 Type FireType Fighting

Mega Evolution

Pokédex Pokémon Sprite Type
#003 Venusaur 003M Type GrassType Poison



While the Ability makes sense in terms of which Pokémon have it (mostly animals with large amounts of body fat like seals, sea lions, walruses, pigs, and cows) it's actually rather redundant in most cases due to the fact that most Pokémon who have it naturally resist Fire-type and/or Ice-type moves due to their typing. The only Pokémon so far to receive significant benefits from Thick Fat are Mega Venusaur (Grass is weak to both Fire and Ice) and Appletun (while Dragon's resistance to Fire cancels out Grass's weakness to Fire, both Grass and Dragon are weak to Ice).

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