Before the show's premiere, shorts of it were included in Disney films known as I'll Be Home for Christmas, Mighty Joe Young, The Rescuers, My Favorite Martian, 101 Dalmatians, and Doug's 1st Movie. There was even ad for Disney's One Saturday Morning that the show was to premiere on that channel on March 13, 1999 under the title MouseWorks but for some reason it didn't premiere until May 1 that year under its current title. Were there production issues involved? Was Disney not able to finish working on the show and it had to be postponed to a later date than it was going to premiere?
Several of the gag cartoons were released theatrically with various 1999 Disney movies and released to theaters as commercials for the show. These included: