From the Super Mario Wiki
Not to be confused with Greap
A Greaper is a ghost-like creature from the game Super Mario RPG: Legend of the Seven Stars. They appear in the Sunken Ship. These hooded ghouls resemble a cross between a Shy Guy and the Grim Reaper, hence their name. Greapers are related to the powerful Glum Reapers. One friendly Greaper is a member of the Three Musty Fears from Monstro Town. One specific Greaper also showed the ability to take the appearance of Mario, reflecting almost everything of the plumber's movements.
Names in other languages
|Portmanteau of Yūrei and Heihō;|
subsequently used for Boo Guy.
- Nintendo Power forgot to list Greaper's stats in the Super Mario RPG Nintendo Player's Guide. The reason they gave was that Greaper wasn't an enemy, even though this is false.