Victory Star
Increases moves' accuracy to 1.1× for friendly Pokémon.
Full effect
All friendly Pokémon's moves, including this Pokémon's own moves, have 1.1× their usual accuracy while this Pokémon is in battle.
In game description
Boosts the accuracy of its allies and itself.
Pokemon with Victory Star
Using Victory Star in Cobblemon
Abilities are passive and always active, so Victory Star 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.