2013 Birthday Pikachu Celebrate Event Added!

Pikachu

Pokémon Info				Trainer Memo	Battle Moves		Ribbons
ピカチュウ	♂/♀	Dex No.	025	Randomnature.	Normal	Celebrate
Lv. 10		Type			Normal	Play Nice
		Electric		Pokémon Center	Electric	Thunder Shock
		OT	ポケセン♪	Apparently had a	Normal	Quick Attack
		ID No.	10123	fateful encounter at	This Pokémon was available inJapan from October 12, 2013 to ???, 2014.
Item		Ability		Lv. 10.
None		Static
The date this Pokémon was received is determined by the date on the 3DSwhen the Wonder Card is received.
Can be obtained with: X Y

2013 Birthday Pokémon

Bulbanews has an article related to this subject:

Birthday Pokémon event distribution announced for Japan

These Pokémon were distributed to players in Japan if they visited aPokémon Center store up to two weeks before or after their birthday, but only if they provided proof of their date of birth. The distribution started on October 12, 2013.