Crystal Caves is the fourth world in New Super Mario World. It is cave/underground themed. The Switch Palace is purple. The boss is Morton Jr.


  • 4-1: Crystal Cavern
  • 4-Ghost: Underground Mansion
  • 4-2: Volcanic Tunnel
  • 4-A: Underground Lake
  • 4-3: Construction Cave
  • 4-4: Minecart Ride
  • 4-Castle: Morton's Wrecking Ball Castle

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