All of the studios of the period (Disney, Warner Bros., MGM, Iwerks, Lantz, Fleischer, etc) engaged in the production of cartoons with racial stereotypes, some studios more than others. While the regrettable images appeared in a relatively small portion of the overall output of those studios, they did exist.
Many of the stock stereotypes of black people in old animated shorts can be found in Jay-Z’s video, from thick-lipped minstrels and cannibal natives to plantation workers, sharecroppers, and Little Black Sambo.
source: worldstarhiphop.com