???

??? is a name for several subjects if there is a mystery regarding their nature. It is usually just a temporary name before their actual one is revealed:
*???, a dimension in Luigi's Mansion: Dark Moon and the subject's only name
*???, a name that Ms. Mowz goes by in the Trouble Center in Paper Mario: The Thousand-Year Door
*??? is the title for each boss in Yoshi's Crafted World prior to being unveiled.
Some subjects are represented by more than three question marks:
*????, an enemy in Mario & Luigi: Superstar Saga
*????, the Japanese name for Junior Shrooboid in Mario & Luigi: Partners in Time
*????, the name for Antasma when first fought in Mario & Luigi: Dream Team
*?????, the title for Doopliss during his first battle in Paper Mario: The Thousand-Year Door