Wario Land 4/Ruby Passage

Ruby Passage is considered the hardest passage to beat, not including the Golden Pyramid. The entire passage is factory themed.

Levels

 * The Curious Factory
 * The Toxic Landfill
 * 40 Below Fridge
 * Pinball Zone
 * Cuckoo Condor

The Boss of the Emerald Passage is Cuckoo Condor.