Ghosts are enemies from the Classic Trilogy of Midnight Synergy's Wonderland videogame series.
Ghosts can move through through solid objects that Stinkers or other enemies cannot. They, however cannot move over water or lava, and cannot go through walls or Plasma Boxes. They are also hard to destroy as they are immune to fireballs. The only ways to destroy them are to lead them next to a Powder Keg, or sliding a Plasma Box across a Conveyor Belt into them.
- If the last Stinker in a level goes into an exit while a Ghost is inside it, the level will be complete, but it will look like the Stinker dies. However, if the Stinker is not the last one in the level, then the level will be failed.