Pixar just released another of their SparkShorts, "Kitbull":
This film was directed by Rosie Sullivan, one of our talented story artists. I had the pleasure of working with her for about 6 weeks. It was my first experience with 2D, hand-drawn animation, and I absolutely loved it! The animators did all their own roughs, cleanup, and even coloring in TV Paint. The background paintings and compositing were handled by other artists. We had a very short and intense schedule and a shoestring budget, but honestly it was the most fun I've had animating in years. I hope I have the chance to do more 2D animation soon!