Instructions
Head to Mickeyjunk Mountain, which will become available after you finish the Mean Streets level.
Walk around the mountain until you spot the giant crane. Press the "A" button to paint in the bridge, which is shaped like part of a guitar.
Cross the bridge and walk to the crane. Speak to the crane operator and he will tell you that you need three TVs.
There are two TVs at the base of the crane. One is behind the crane and the other is next to the trash pile on the right-hand side. Hit the "A" button to activate each TV.
Walk clockwise around the crane until you come to the wall. Press the "Z" button to thin the wall, then pass behind it to spot the third TV. Press the "A" button to activate the TV.