Famous Studios continued to release Popeye shorts, which shifted to color in 1943 as well as creating "Noveltoons", an anthology short series similar to Fleischer's "Color Classics". Noveltoons introduced many notable characters such as "Blackie the Lamb", "Wolfie" (Blackie's main rival), "Casper the Friendly Ghost" (adapted from a children's story book), "Little Audrey" (a character similar to and replacing Little Lulu), "Herman and Katnip" (A cat and mouse duel similar to "Tom and Jerry"), "Baby Huey" (a large though dim-witted baby duck) and many other lesser known characters.