Natural Cure
Cures any major status ailment upon switching out.
Full effect
This Pokémon is cured of any major status ailment when it is switched out for another Pokémon. If this ability is acquired during battle, the Pokémon is cured upon leaving battle before losing the temporary ability.
In game description
The Pokémon's status conditions are cured when it switches out.
Pokemon with Natural Cure
Using Natural Cure in Cobblemon
Abilities are passive and always active, so Natural Cure 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.