When I was at WDW last month, he was at Al's Toy Barn which is near the exit to MuppetVision 3D at MGM, and inside the Timekeeper Lobby right across from Stitch's Great Escape's entrance at MK. the MK location is a little more hidden than the MGM one, so lines are usually shorter in comparision. Plus, Stitch and Mr. and Mrs. Incredible are usually there too.