Stamina
Raises this Pokémon's Defense by one stage when it takes damage from a move.
In game description
Boosts the Defense stat when the Pokémon is hit by an attack.
Pokemon with Stamina
Using Stamina in Cobblemon
Abilities are passive and always active, so Stamina 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.