But then, the air in the Grand Lobby began to shimmer with a strange, digital static.

The most important part of this update is the fix for the bug that corrupted save data or prevented players from saving their progress on specific floors. Before this patch, many players lived in fear of losing hours of progress. Post-update, the save system is stable and reliable. If you have an earlier version of the game, applying this update is mandatory to ensure you don't lose your save file.

is a micro-update (only ~45 MB). It does not contain new content. Instead, it patches:

of them. Each one was a different shade of neon: electric blue, sunset orange, and even a shimmering pink. "Oh no," Luigi whimpered. "Too many me-s."

One notable change for competitive players was the patching of the on 4F. This skip previously allowed players to bypass the third phase of the Amadeus Wolfgeist fight, saving roughly 2.5 minutes . Version 1.4.0 added a "paranormal gate" to the dressing room door to prevent this exploit.

: Three outfits for Luigi: Amazing Luigi (Magician), Cap’n Weegee (Pirate), and Paleontoluigist (Paleontologist).