Zero To Hero
Transforms into its Hero Form when switching out.
Full effect
The Pokémon transforms into its Hero Form when it switches out.
In game description
The Pokémon transforms into its Hero Form when it switches out.
Pokemon with Zero To Hero
Using Zero To Hero in Cobblemon
Abilities are passive and always active, so Zero To Hero 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.