http://www.walmart.com/catalog/product.do?...150300302685799

Spotted this post in GoNintendo:

Walmart's '2 for $20' DS title sale
September 17, 2009 by RawmeatCowboy. Filed Under: DS

Want to grab yourself 2 DS titles for $20? Walmart.com is giving you an opportunity to do so! They have 25 DS titles that qualify for the deal, with some of the better options posted below.

* Bangai-O Spirits
* Dragon Quest Heroes: Rocket Slime
* Dragon Quest Monsters: Joker
* Final Fantasy III
* Ninja Gaiden Dragon Sword
* Spanish for Everyone

Check out the deal here (thanks Dan!)