Thick Fat (ability)

Effect

Thick Fat reduces the damage taken from Fire-type and Ice-type moves by 50%.

Interestingly, many Pokémon possessing this ability already take reduced damage from those types. A Dewgong or Walrein with Thick Fat would take 18 normal damage when hit by an Ice-type move.

Game descriptions

Ruby​/​Sapphire
FireRed​/​LeafGreen
Emerald
Heat-and-cold protection.
Diamond​/​Pearl
Platinum
Raises resistance to Fire- and Ice-type moves.
HeartGold​/​SoulSilver Ups resistance to Fire- and Ice-type moves.
Black​/​White
Black 2​/​White 2
Ups resistance to Fire- and Ice-type moves.
X​/​Y Boosts resistance to Fire- and Ice-type moves.
O.Ruby​/​A.Sapphire Boosts resistance to Fire- and Ice-type moves.
Sun​/​Moon
Ultra Sun​/​Ultra Moon
The Pokémon is protected by a layer of thick fat, which halves the damage taken from Fire- and Ice-type moves.

Other languages

English Thick Fat
Japanese あついしぼう (Atsui Shibō)
German Speckschicht
French Isograisse
Italian Grassospesso
Spanish Sebo