It was only a matter of time before Amiibo customizations would begin to make appearances online. Imgur user chibisilverwings has posted some recent creations with purchased Amiibo figurines featuring Pikachu, Villager, and two different Links. The figurines range from the cute (Pikachu with goggles), to the awesome alternates (Dark Link and Zora Tunic Link), all the way to the, well, morbid (serial killer-style Villager.)
In addition to these amazing customizations, there are others floating around the internet, such as a lovely Blue Yoshi Amiibo.
I might be making a few upgrades myself after seeing what others have done with the neat little NFC figurines. Now all I have to do is wait for my Toon Link to arrive!