Of Interest:

A segment was cut out of the finish film. In it Eddie Valiant sneaks into Jessica's dressing room at the Ink & Paint club and is caught by Bongo the Gorilla, who takes him to Judge Doom for questioning. When they finally let him go he finds that they have stuck a toon-pig's head on him. He washes it off in the shower with the dip formula. As he comes out of the bathroom Jessica is waiting outside. To cover this in the film a toilet is heard flushing of-screen to explan why he was in the bathroom.

Robotics, pulleys and puppetry where just some of the devices used to create the illusion of the toons interacting with real world objects. Here is an example using the scene of R. K. Maroon giving Roger a drink in his office: before and after the final animation was added.

Warner Bros. loaned their biggest star, Bugs Bunny, on the proviso that he would get equal screen time as Disney’s biggest star, Mickey Mouse. As a result both characters appear in shot at the same time as each other. Both characters also had to have the same amount of dialog.

Many old character model sheets of the classic characters were pulled out of their respective studio’s archives to assure that the film’s animators could match the drawing styles of the characters to the year the movie was set.

Some cuts of Eddie Valiant in the taxi during the chase scene are actually of an animated Bob Hoskins.

Several voice artists reprised the roles of characters they had played before. One of the most notable is that of Mae Questel, who did the voice of Betty Boop in 1930, until the character’s retirement in 1939.

Other characters were planned to be in the film were: Fleischer Studios' Popeye and Olive Oyl, MGM’s Tom and Jerry, and Casper the Friendly Ghost. Felix the Cat was also planned to appear ‘live’ on the film, but was instead immortalized on the keystone of the Toon-Town tunnel as the masks of comedy and tragedy; there is also a photograph of him shaking hands with R. K. Maroon in Maroon's office.

Anachronisms...

Speedy Gonzales, Wile E. Coyote and the Road Runner appear in this movie despite the fact that they were all created after the date the movie was set. They were included on the insistence of Robert Zemeckis and Steven Spielberg, as they are they favourite characters.

The Goofy short (Goofy Gymnastics) that is shown in the cinema wasn't made until 1949.

Also despite being mentioned in the film, Chilly Willy the penguin would make his debut in 1953.