In the Halloween section at Target, look in the non-candy food section for a 20-pack of chips and Cheetos. They have a mail-in offer for a Skylanders Sidekick figure on them. You need the UPC from the outer bag and $2 for shipping.
I googled the offer, and apparently it's been around for a few months already:
http://www.fritolay.com/about-us/press-release-20120712.html
Maybe I need to eat more junk food so I'd know about this stuff earlier?