Mr. Mouse Takes a Trip (1940)

Mickey sets off on a vacation from Burbank to Pomona by train, but trouble arises when conductor Pete denies him entry with Pluto. In a clever attempt to sneak his dog onboard, Mickey stashes Pluto in his suitcase, leading to a series of humorous escapades. Despite his best efforts to keep Pluto hidden, chaos ensues when Pluto accidentally gets snagged by a mail hook. However, the story leaves viewers questioning whether Pete's victory is as assured as it seems, setting the stage for unexpected twists and laughs.