Refreshroom

A Refreshroom is a special type of Mushroom found in Mario & Luigi: Partners in Time and Mario & Luigi: Bowser's Inside Story. In the former game, this unique item cures "shroomshock," a state of unconsciousness. Mario has to find a Refreshroom for Toadsworth, who fainted during the unveiling ceremony of Professor E. Gadd's Time Machine. The plumber finds the mushroom in Toadworth's room in Peach's Castle.

In Bowser's Inside Story Refreshrooms are dropped by the large bosses that Bowser grows supersized to fight. They look exactly the same as a normal Mushroom, albeit huge to match Bowser's size. Refreshrooms heal 50% of Bowser's health bar in these fights.

Trivia

 * Refreshroom is a portmanteau of "refresh" and "mushroom."