 Disney kept all merchandising rights.Spielberg convinced Warner Bros., Fleischer Studios, King Features Syndicate, Felix the Cat Productions, Turner Entertainment, and Universal Pictures/Walter Lantz Productions to "lend" their characters to appear in the film with (in some cases) stipulations on how those characters were portrayed; for example, Disney's Donald Duck and Warner Bros' Daffy Duck appear as equally talented dueling pianists, and Mickey Mouse and Bugs Bunny also share a scene.Apart from this agreement, Warner Bros. and the various other companies were not involved in the production of "Roger Rabbit."