Peek-a-Boo Ghost House
From the Super Mario Wiki
Peek-a-Boo Ghost House, or Frosted Glacier-Ghost House, is the ghost house course of Frosted Glacier in New Super Luigi U. It is unlocked by completing Weighty Waddlewings or Ice-Slide Expressway, and its own completion unlocks Wendy's Thwomp Castle.
The level starts in a ghost house on a platform that turns into coins when stood upon for a few seconds. The player must then cross some moving platforms, where five ? Blocks are found. A wall that disappears and leaves coins behind is found, along with a group of Circling Boo Buddies. Another wall disappears, allowing the player to reach an area with a group of coins and a Big Boo. Two more disappearing walls are found, with a group of ? Blocks found in between. The middle ? Block contains either a Super Mushroom or a Super Acorn, depending on the player's form. More moving platforms are found, along with a Boo and a group of Circling Boo Buddies. Two groups of Circling Boo Buddies are found together, followed by a pathway with disappearing walls. A Warp Door is found at the end, leading the player outside where a group of dissapearing blocks and the Goal Pole are found.
When the player collects the second Star Coin, they need to run to the left to reach a nearby secret door which leads to the Goal Pole. The secret exit opens up Fliprus Floes.
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