It is a temporary room for certain parties/events in Club Penguin Rewritten. It may or may not return in the future.
The Underground was a party room in Club Penguin Rewritten for the stage play Norman Swarm Has Been Transformed. To find it, five penguins need to stand on a pattern of X's near a boulder, and at least one must wear a bug costume.
|Magic Phial Pin|
- If five penguins stood on the five X's in the room, a chest would open, revealing the Magic Phial Pin.
- When the April Fools' Party 2020 started, it was replaced with the Desert Dimension. This was never fixed.
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