Finding every hidden treasure in New Super Mario Bros. U Deluxe requires patience, especially when exploring the spooky locales of the Frosted Glacier world. The Swaying Ghost House stands out as a particularly tricky level due to its moving platforms and confusing illusionary pathways. Masterfully tracking down all three Star Coins along with the secret exit will test your platforming precision and observation skills.

The First Hidden Star Coin

As you enter the shifting corridors of the mansion, keep a close eye on the moving platforms that tilt back and forth. The first collectible is positioned relatively early in the level, hovering safely above a large gap between two swaying structures. Timing your jump carefully when the platforms reach their peak height ensures you grab the coin without falling into the abyss below.

If you miss the initial window, wait patiently for the mechanical shift to reset before attempting the leap again. Rushing through this area often leads to unnecessary damage from roaming Boo ghosts that track your movements. Utilizing a well-timed wall jump can also provide the extra lift needed to secure this tricky item safely.

Revealing the Secret Second Coin

Progressing deeper into the haunted house reveals a series of fake walls and hidden alcoves designed to deceive unsuspecting explorers. The second coin is concealed behind an illusionary ceiling patch located near a seemingly ordinary signpost. You must bounce off a nearby enemy or time a high jump perfectly to phase through the false barrier and reveal the hidden room.

Inside this secluded chamber, the coin will quickly materialize alongside a few helpful extra lives. Be prepared to exit the room immediately, as Boo clusters tend to spawn the moment you claim the prize. Maintaining your momentum during this segment is vital for staying ahead of the ghostly pursuers.

The Final Coin and the Elusive Secret Exit

The third collectible requires navigating toward the final section of the mansion where the shifting elements become much more frantic. Look for a peculiar pipe hidden beneath a heavily swaying platform that appears inaccessible at first glance. Dropping down at the exact moment the platform swings away grants you entry into a secret underwater cavern containing the final coin.

This hidden route also leads directly to the alternate flagpole, allowing you to unlock new paths on the world map. Navigating this final sequence successfully ensures a complete mastery over this chilling and deceptive level. Sharing your achievements with friends remains a great way to celebrate conquering one of the game's toughest challenges.