The Skeleton Key appears three times as an item in the Mario Party series.
The Skeleton Key appears in both Mario Party 2 and Mario Party 3. The Skeleton Key in Mario Party 2 has a more feminine look while the Skeleton Key in Mario Party 3 appears more masculine. In Mario Party 2, the skeleton key can be bought for 20 coins or found in item mini-games. The Skeleton Key unlocks secret doors on board maps that lead to short-cuts and events. When a character approaches a door on a board map, they will have the option to open the door if they had a Skeleton key. In Mario Party 2, a character was not able to discard the Skeleton Key unless they use it on a door. However, in Mario Party 3, the character has the option to discard the key.