Stakeout
This Pokémon's moves have double power against Pokémon that switched in this turn.
In game description
Doubles the damage dealt to a target that has just switched into battle.
Pokemon with Stakeout
Using Stakeout in Cobblemon
Abilities are passive and always active, so Stakeout 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.