Go to Monstropolis, enter The Power Plant/Tank Yard, take the yellow/black crane up to the platform where it will give you the option to Air Step. Instead of using Air Step, drop back down the hole you just came out of. Use Dive Attack to destroy the red shipping crate, inside you will find a large Treasure Chest containing Mickey's Circus.
"Bounce the balls over to the seal!"
Use and to adjust the angle of your pole and change the direction the balls bounce.
The seal will change positions, so stay on your toes.
Mickey's Circus is based on Walt Disney’s 1936 animated short "Mickey's Circus".