Jelly Pipe
From the Super Mario Wiki
The Jelly Pipe is a sewer level from Yoshi's Story. The stage number is Stage 2-3. The level is made up of a "jelly extractor", used to extract jelly from the jelly-rich soil. However, few things have need to enter the dark sewers, and so they are riddled with strange monsters. Some of these, but not all, include Big & Little Boo, Jelly Ghosts, Spiked Fun Guys, Slugs, etc.
