Translations:Abilities/3/en
From Pixelmon Wiki
Abilities, including hidden Abilities, can be passed down through breeding. There is an 80% chance that the mother Pokémon will pass down her Ability, or a 60% chance for hidden abilities; the other 20% or 40% of the time, the Ability is chosen randomly from the Pokémon's normal Abilities (with no chance of a hidden Ability). Along similar lines, the father has a 60% chance of passing down his Ability if he breeds with a Ditto, which applies for both normal and hidden abilities.