Can you get leftovers in white 2 and if yes where can you get them?

Question

I just really want the item leftovers.

Answer 1

Yes,you can get it in the castelia sewers.
http://www.serebii.net/itemdex/leftovers.shtml

Answer 2

You get the Leftovers in Castelia Sewers or find it on Snorlax/Munchlax.
Source: Experiance and This.