*Normal Ability - Male and female.*
*Hidden Ability - In Generation VI, any Pokémon, including male and genderless Pokémon, can pass down their Hidden Ability when bred with Ditto. Ditto's Ability is irrelevant to inheritance. If the male is bred with another Pokémon from the same egg group, Hidden Abilities will not be passed down.*
All around 20%.
Source - Bulbapedia
Hope this helps!