What is the breeding rate when both Pokemon are the same species with different ID #'s and are holding the Oval Charm??

Increases the chances of a Pokémon producing an egg.

Source:Bulbapedia/ Oval Charm

Same species, different ID numbers

The chance of getting an Egg is 69.3% (has a value of 70). The old man in the Day Care will say: “The two seem to get along very well.”

Source:Bulbapedia/ Bredding Rate___This is the highest chance of getting an egg: 69.3%. What is the new percentage after factoring the Oval Charm in??

Pleaselog inorregisterto add a comment.

Freshly imported from Ninja.

Increases the chances of a Pokémon producing an egg.

Not good enough, huh? :P

—God, dis was difficult. This is a valid answer so far, and I cannot find anything anywhere else saying otherwise.

—The chances are changed every 256 steps.

After looking into the code with some tools of mine(calculation tools, editing tools, viewing tools, coding tools, etc.) (legality questionable?), I found some stuff on the Oval Charm. So, I ran calcs, and got a 10% increase the first time. After retrying it, it went to 11.25% increase. Tried it again. 5.75% increase, and other various numbers.

Source