Heatproof
Halves damage from Fire moves and burns.
Full effect
This Pokémon takes half as much damage from Fire-type moves and burns.
In game description
The Pokémon's heatproof body halves the damage taken from Fire-type moves.
Pokemon with Heatproof
Using Heatproof in Cobblemon
Abilities are passive and always active, so Heatproof costs you nothing to run. If it is marked hidden on a species above, expect it to be harder to obtain: servers differ in whether hidden abilities come from breeding, an Ability Patch, or events.
See the Pokedex for which abilities each species can have, and IVs, EVs and breeding for how to actually pass one down.