I ran into a problem earlier today when I decided to try and get a shiny egg from nidoran.
I was supposed to start the game by May 14, 2075 on 05:27:13, and have entered my parents into the daycare on frame 6. The first time, I assumed that the game started on frame 6, but it started on frame 3. So I ended up getting a Serious Nature Poison Point Nidoran(F), non-shiny of course.
My second attempt, I hit the seed again, this time, advance the frame by 3 before entering my parents into the daycare and I ended up getting the same serious nature poison point nidoran(F).
I must be doing something wrong.
EDIT: so I found out that I was supposed to be skipping eggs until the daycare man had the sixth egg. I finally got to the sixth egg and saved.
Even though the egg I received was rash nature with the correct ability, I got a Nidoran(F) and the pokemon wasn't shiny!