Originally released in Japan beginning December 2010 as a promotion for
Pokemon Daisuki Club players, players of Pokemon Black and White could get a Male Togekiss with its Hidden Ability, Super Luck, on their birth month.
And now, seemingly without any announcement, the same Togekiss has been released internationally.
To redeem it, login to your
Pokemon Trainer Club account and in the month of your birthday access your mailbox via the envelope icon on your Trainer Card. From your mailbox, click on the letter entitled Happy Birthday From Pokemon.Com, and you will be thrown a birthday party by several Pokemon. Afterward, you can claim it like any other promotion on the Pokemon Global Link website.