I originally started on paint, as you could tell by some of my earlier sprites because they have a different color scheme from the original Pokemon all together. However, as I moved from a Dell laptop to a Mac with Photoshop, I now use photoshop quite a bit since I know how to sprite and tweak stuff very well. I'm also always learning new tricks in the program since my mom and her co-workers use it constantly for their jobs, so they give me tips a lot of the time. I can say the best tip they gave me was to save as a png not a jpg. Life saver advice right there.