Red-August 8

Green/Blue Oak -November 22

Blue/Green- June 1

Yellow-March 3

Gold- July 21

Silver- December 24

Crystal- April 30

Ruby- July 2

Sapphire- September 20

Emerald- May 31

Diamond- December 4th (Sagittarius)

Pearl- Febuary 12th (Aquarius)










And then Platinum, Black, White, Bianca, and Cheron's birthdays have not been revealed yet. Heck, I had to go back to my old articulo on the Pokemon club to get Diamond and Pearl's birthdays because they are no longer on Bulbapedia anymore.