I want one.
After defeating Rood in Driftveil, he will give you one. Its OT is N.
In Black 2 and White 2 you can get a Zorua in the main story. Rood gives you N's Zorua in Driftveil city.
Source: Me and Bulbapedia.
After going to driftveil city, make sure you have an empty slot in your party, you'll get one in the Ex-Team Plasma base and he'll ask you to take care of it, you can decline it but you can still retrieve it later on.