Fun Guy

Isaac turns into a walking Mushroom after picking up three distinct items from the following list. Grants a Red Heart container.

Trivia

 * The name Fun Guy is a slang term for psychedelic mushrooms and a wordplay on fungi.
 * Fun Guy may be a reference to the character of the same name in Chrono Cross.
 * Fun Guy's appearance may be a reference to the character Toad, a humanoid mushroom from the Mario franchise.