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

The Bee Mushroom is a yellow mushroom with brown stripes that debuts in Luigi's Mansion 4: Haunted Dreams. It first appears in the Honeybee Mansion after Luigi collects the first ? Coin. It returns in Luigi's Mansion 5: Curse of the Mansion where it is first found in the Honeymoon Mansion. When Luigi grabs the power-up, he will become Bee Luigi. While in this form, Luigi can fly for a limited time until the flying meter reaches zero. Luigi can refill the meter by collecting coins or getting back on solid ground and waiting for the flying meter to replenish. Luigi can also stick to honeycomb while being Bee Luigi. Additionally, he also has capabilities of standing on clouds and flowers. Touching water or taking damage will cause Luigi to return to his normal form.

The Bee Mushroom reappears in Luigi's Mansion 6: U Are Doomed!!, with the same function. Interestingly, it only appears in the Bouncy Bee Mansion.