I wasn't just referring to that thread, I was referring to this post too.
I removed the other post, cause this one already exists. No need to have the same post everywhere.
Anyhow, let me breed up some mons in game first.
@Kaphotics not sure if it's the oddity of the game, but Pichu maintains nickname flag, but Cleffa doesn't.
For clarification, I bred these and nicknamed them in-game.
The only modification was what I did prior to them hatching, to change the hatch counter to 1.