Someone has made a helpful website that will track the stock for any Amiibo you might be missing in your collection.
The site’s creator is Chris Ryan and he has set up a website called Amiibo Trackr. This helpful website updates you on which Amiibo may still be available at retail stores. It saves you time ringing up the retailers yourselves. It also shows you which Amiibo might be sold out too.
The Amiibo Trackr website starts off with the countries of USA and Canada. It’s unfortunately only limited to North American retailers, so don’t bother using the website if you live elsewhere.
Once you click on the preferred country, all of the Amiibo will show up. Click on the Amiibo you are looking for and all of the retail stores will be shown. After you have done that, it will tell you which stores have that Amiibo in stock or not.
The only retailers he included in the website are Walmart, Best Buy, Gamestop, Toy R Us, and Target for the USA. In Canada the retailers are Best Buy, Future Shop, EB Games, Toys R Us and The Source.
You can help out the website too by reporting on any inaccuracies it may have on the stock levels.