BobbeyjazzProfessional General Artist
I took the original art from the show, or at least the concept art, which I modify by using a program called paint.net. The first one took me maybe 2 hours to sprite since I had never made a custom sprite before. I'm pretty sure photoshop would work as well. I don't really have a trick to it, but I'd say you need a good eye and a good "spriting" sens.