I love the Mouse, but I also love to see it get spoofed as well.
My #2 favorite parody is the Simpsons episode that combines both 101 Dalmatians and Beauty and the Beast (Two Dozen and One Greyhounds, season 6). "See My Vest" has to be the best all time song parody there is.
My #1 is from the old Rockey and Bullwinkle show. From Fractured Fairy Tales, "Sleeping Beauty". The prince races to the princess' rescue. Upon finding her, he plans to awaken her with a kiss. But wait! He realizes that he has a potential goldmine in front of him. The prince instead turns the castle into "Sleeping Beauty Land" and charges admission to gaze upon the slumbering female (he also sells hats, gumballs, and other products as well). What is Really funny is the Prince is a dead (no pun intended) ringer of Walt. This episode aired in 1960 and it skewered Disneyland to a tee.
Those are my faves, What's yours?