I keep my Pokemon's names original. Though, I have nicknamed one Pokemon: "Kyuubi" the Ninetails.
(yay for Naruto reference)
May make random appearances every-so-often. Trying to officially return...
POKEMON BLACK FRIEND CODE: 1249-2602-6566
POKEMON BLACK2 FRIEND CODE: 1679-1583-9820
POKEMON Y FRIEND CODE: 3308-5051-2299