Woah, Woah, Woah, the info on "Giantland" is WAY off.
First off, there are no known movies with this title (or Mickey's Giant Conquest) releases indo 1993.
The first thing that comes to mind are the 1930's shorts "Giantland" and "Ye Olde Days", both with presence of a giant for Mickey to fight.
However, it was also stated that this was based on Jack and the Beanstalk, which leads to the film that I think is the most likely to have based this world on: "Fun and Fancy Free", which is split into two shorts, the second one being Mickey and the Beanstalk. Aside from it being the last time Walt Disney voiced Mickey, it is by far the most famous appearence of giants in a Mickey cartoon, featuring the lovable and naive Willy the Giant.
My apologies, dyslexic me saw 1993, the article actually says 1933 which is in line with the release year of “Giantlandâ€. In Japanese it has a different title, 「ミッã‚ーã®å·¨äººå¾æœã€which I translate directly into English as “Mickey’s Giant Conquest†for the sake of distinguishing a difference between the Japanese and English titles.