Let's make a scenario
I have a female infernape with iron fist and male hitmonchan holding a everstone because he has a adamant nature and I want him to have both the DW ability and the nature please tell me thanks
It will be either 60% or 80% chance that Infernape will pass her ability to her offspring. There's no way to increase this, unfortunately, so just keep trying.
Hope I helped. :)