I can't find a definitive answer online...
If I have a female pokemon with a hidden ability, can I pass it down via a ditto, or do I need a male of the same species? Does the male also need to have the hidden ability?
I've gone through like 20 gligar with no immunity yet, but the parent female gligar does have it, while breeding with a ditto.

Thanks in advance.

Also to clarify, this is gen 5 I'm referring to.