From Serebii.net - Where Legends Come To Life

Starting Nov. 5th, lasting to Nov 16th, various retail Outlets (like EB Games and K-Mart) are giving away a special Arceus. This Pokemon will trigger events in the upcoming Heartgold and Soulsilver!

This Arceus is level 1 with the unique moves found on Dialga, Palkia and Giratina.

I do not know where to go to find the locations of the stores. Anyone who can, please post so others may find it!