Welcome to the Pokecommunity Forums, LadyHum! I see that you are an avid pokemon fan since of age...8? Pokemon Red was also in fact my very first pokemon game I've had and played. I still have it now and will not sell my cartidge no matter what. Since you're currently playing Diamond version, you'll love our Fourth Generation Game forum in the General Pokemon Gaming Discussion section. So check it out and share your stories of the blue ponyta encounter! Now speaking of that you're not alone when it comes to finding such rarities. We have quiet a number of users whom had similar experiences like you had, so no fret!.
Here's something for you to remember, PC is probably going to be the most friendliest Forum site you've ever are going to experience and we have tons of friendly and also crazy users whom you'll be great friends with, so please stay and have fun! :D
One last thing, be sure to read the Forum
RULES before you go and start posting alrighty?
LASTLY, if you need any help with anything or have questions just look for the
BOLD BLUE USERNAMES and they'll be more than happy to help you out and answer you questions! :)
If you ever need to talk I'm just a VM/PM away. :3
Have fun and happy posting away!