Bonus challenge (Luigi's Mansion: Dark Moon)

Mini Dimensions appear in Luigi's Mansion Dark Moon. To access a mini dimension Luigi has to locate a shaking door. They can be found on fridges, coffins or fake doors, and are usually hidden from view or behind fake walls requiring the player to hunt them out. Once he opens it he is pulled into the Mini Dimension. Here Luigi must complete a set of tasks or minigames. These range from collecting several Red Coins and normal Coins in a maze, finishing a snowman's face, or having a snowball fight with some Hiders. They have to be completed under set time limits. Managing to do so will reward Luigi with either a Gemstone or a large bounty of treasure. Failure to do so will get Luigi nothing. Luigi returns to where he entered afterwards.

History
Little is known about the Mini Dimensions, these portals appear at random and teleport Luigi into the Paranormal Dimension. They put Luigi onto small floating islands that seem to have been built by the inhabitants of the dimension as they seem to be a mix of mazes and small decorated islands.