So, I'm not sure about creating a registry on this site, but MyRegistry.com has been expanding like crazy into Canada from what I understand! I actually just saw this morning (article HERE ) that that they've partnered with Canadian Tire to launch CT's new wedding registry!!
BUTTTTT if you create your registry directly on MyRegistry.com, you can add items from literally any store, anywhere! And you still get all the perks that different stores offer for creating a registry with them! My fiancé and I even created cash funds for our honeymoon and for a downpayment on a house!! It's a pretty great tool—can't recommend enough!