Toys-R-Us and Target Amiibo Pre-Orders Suddenly Cancelled
Nintendo Didn't Foresee the High Demand?

Previously, the Lucario and Rosalina amiibo were revealed to be exclusive to retailers Toys-R-Us and Target respectfully. Now, it seems the pre-orders for those two particular amiibo are being cancelled.
On reddit, there have been many people stating they had their pre-orders cancelled. Looking at the retailers' websites, neither Target nor Toys-R-Us have the option to pre-order. Lucario doesn't even come up in the system anymore. The Meta Knight and Shulk pre-orders are still live though at Best Buy and GameStop respectfully.
Player Theory will keep you posted on additional information on the status of the third wave of amiibo.
Source: Reddit

Super Smash Brothers Wii U
Release: 11/21/2014 [NA] 12/5/2014 [EU] 12/6/2014 [JP]2014 Q4
ESRB Rating: Rating Pending
Publisher: Nintendo
Platforms: Wii U
Purchase: Amazon