The room is very narrow and small, making it one of the smallest rooms in the Luigi's Mansion series. It's sits between the Lab and the Studio, with a small hole that Luigi can look into and see Hiders trying to create a Portrait of themselves. In Mission A-2 "Gear Up", Luigi needs to find a Key for the Master Hall to the Foyer that is in the secret pocket.
- The Secret Pocket is one of the smallest rooms in the Luigi's Mansion series.
- There is also three Coins in the Secret Pocket.