The item Coil Mushroom does exist. However, it is mostly known as Spring Mushroom. You may find out more information about it by clicking here.
Coil Mushroom
Coil Mushroom
  • First Appearance
Luigi's Mansion 4: Haunted Dreams (2009)
  • Latest Appearance
Luigi's Mansion 6: U Are Doomed!! (2012)

The Coil Mushroom (also known as Spring Mushroom) is a Power-Up that first appeared in Luigi's Mansion 4: Haunted Dreams. It is first found in the Playing Ground Mansion, where it is found in the first mission. It makes its second appearance in the Rapid Acid Mansion, and its final appearance is in the Wet Wave Mansion's Green Coin challenge where it is used to retrieve several Green Coins that are placed up high. The Coil Mushroom's model is a metallic mushroom with a head that's shaped like a piece of coil. When it is used, a spring will wrap around Luigi's body, which turns him into Coil Luigi (or Coil Mario when playing as Mario, respectively).

This item makes a reappearance in Luigi's Mansion 5: Curse of the Mansion, where it is found only in the Chomp Factory Mansion in all levels.

The Coil Mushroom makes a comeback in Luigi's Mansion 6: U Are Doomed!!. It is only found in the Coil Court Mansion. It is used to reach items that are too high to reach.