Hop 'n' Pop Till You Drop
From the Super Mario Wiki
Yoshi starts the level in a desert-like area with bubbles containing enemies and moving platforms, with some balloons and the next area nearby. Here, a Middle Ring awaits, along with a trail of moving platforms and bubbles, one of them containing a key. The key opens a door which leads to an area with a Mega Eggdozer and the goal roulette.