Ability inheritance rates are unclear

[alfalfascout]

Everywhere I look provides different information about how often abilities are inherited and from which parents. There isn't any data on crossing evolutionary lines, either. I've come up with a few tests involving hidden abilities that should tell us what we need to know. Several hundred hatched eggs would give us statistical confidence, but a box or two would be good enough for a general idea. Since the calculator is based on generation 6, only use pokemon versions XY/ORAS.

• [x] Test 1 Breed a pokemon with only one regular ability with a different evolutionary line that has its hidden ability. (e.g. female bulbasaur with overgrow, male oddish with chlorophyll) Write down how many eggs hatched and how many had hidden ability.
• [x] Test 2 Breed pokemon of the same evolutionary line, the male with the hidden ability and the female without. (e.g. female bulbasaur with overgrow, male bulbasaur with chlorophyll). Write down how many eggs hatched and how many had hidden ability.
• [x] Test 3 Breed a male pokemon that has its hidden ability with a ditto. Write down how many eggs hatched and how many had hidden ability.
• [x] Test 4 Breed a female pokemon that has its hidden ability with a ditto. Write down how many eggs hatched and how many had hidden ability.
• [x] Test 5 Breed a genderless pokemon that has its hidden ability with a ditto. Write down how many eggs hatched and how many had hidden ability.

[alfalfascout]

I've been recording my progress with these tests on a google sheet.

[alfalfascout]

I've finished my rounds of testing. My results are about 0% for tests 1 and 2, and 60-70% for tests 3, 4, and 5. Waiting on others' tests to see if we can get higher statistical confidence for that.

[alfalfascout]

Getting lots of help from reddit