The DECEPTICON SNEAK ATTACK ROBOT HEROES 5-pack will be available exclusively at Wal-Mart this summer, beginning at http://www.walmart.com on June 2, 2007.
TRANFORMERS ROBOT HEROES are one of the newest expressions of everyone’s favorite robot warriors. This five-pack features 2 exclusive characters: CLIFFJUMPER and SKYWARP. Three characters with exclusive deco complete the scene: OPTIMUS PRIME and MEGATRON in exclusive supermetal finish and “hologram” deco MIRAGE.
The display package features background illustrations inspired by Episode 3 of the original MORE THAN MEETS THE EYE animated mini-series. OPTIMUS PRIME lays a trap for MEGATRON and the DECEPTICONS, and if all goes according to plan, the DECEPTICONS will be defeated once and for all. The AUTOBOTS create a holographic replica of an important rocket base to lure the DECEPTICONS in, but as the battle begins, the AUTOBOTS discover only a few of their enemies are real. MEGATRON has tricked them, and the real rocket base is under attack as they speak!
http://www.hasbro.com/transformers/default.cfm?page=News/Item&newsID=E7D57538-D56F-E112-49FFDB953D635BDC
EDIT: I updated the subject of the thread as it now appears this exclusive is exclusive to walmart.com and not the Wal-Mart stores themselves.