Mickey (or Minnie) finds himself in the Kingdom of Beanwick, where earthquakes are a constant problem. He decides to lend his help to solve the mystery behind these disasters.
Mickey's Ultimate Challenge is a puzzle game where the player chooses between Mickey or Minnie to play with. The goal is to complete tasks for five Disney characters in the kingdom, each requiring a different puzzle to be solved.
The puzzles are varied and include memory games like cleaning paintings on the castle wall with Daisy. After completing each task, the player receives a gift that must be traded with the right characters to unlock the next stage.
By giving the correct items to the right characters, Mickey or Minnie gains access to the final puzzle and character, ultimately solving the mystery of the earthquakes in the Kingdom of Beanwick.