yeah well long story short:
I imported a japanese Diamond when they first came out in 06.
I found out japanese carts could get the Jirachi on Wi-fi. I got the Jirachi. I hadn't played my japanese diamond since 2007. I checked the daycare and I saw I had a Typhlosion and a ditto. I needed a Cyndaquil for HG/SS. So i hatched the egg. It was shiny. I almost fell off the bed lolz. Apparently the fact that they Typhlosion came from Emerald made the chances better, donno how.