I like Pokemon more than you! :p
The Pokemon Center has started sending out another wave of Special Delivery Bidoof codes. I know this because I just received mine! The e-mail is titled “Special Delivery Bidoof Is Here!”
The initial wave went out last Thursday. Perhaps they will release a new wave of codes at the end of each week?
Furthermore, Pokemon Center’s support page for Special Delivery Bidoof was updated a few moments ago. The page still says codes will be sent out in waves. If this was intended to be the second and last wave, they would have updated it to say so. So we can expect more waves to go out in the future!