Question

Where do you find sableye in Pokemon white 2?

Answer 1

You can't find sableye in the grass, you'll have to trade with Ruri/Tetsu in from nimbasa city or get it from the spooky manor in the dream world with 10,000 dream points

http://www.serebii.net/pokedex-bw/302.shtml

http://www.serebii.net/black2white2/forgottenitem.shtml