These are some models I made of Temmie and The Annoying Dog from the game Undertale. I painted these after printing and glued them on amiibo bases, but you can do whatever you want with them. Good luck!
I would recommend using the blank amiibo base from this file: http://www.thingiverse.com/thing:1038961
I printed these in white plastic. I painted them with Liquitex acrylics afterward and then created custom box art in Photoshop.