To get the pixel art effect I drew and colored a high rez image then converted it from RGB to Indexed. I set the color limit to 16 colors. Then I scaled it down without anti-aliasing then scaled it up to give it a low res look. After that, I cleaned up some loose pixels and refined a few things.

I can upload the original image when I can get back to my PC in a day or two. It is interesting to see how the lower color limit and scaling effects things. The cool thing about these images is that they can be rather large but with the small number of colors used and the PNG format, they are only a couple of kilobytes.