Crumble Rock Rumble
From the Super Mario Wiki
Yoshi starts the level in a lava-themed area with enemies and crumbling slabs of rock, with an entrance to the next area nearby. Here, Yoshi must get himself to the bottom of the area and enter the Whirly Gate which transforms him into Hot-Air Balloon Yoshi. Yoshi must complete the obstacle course to arrive at an area with a Middle Ring, some more enemies, falling rocks, and the goal roulette.