White yummy
When one of the beings known as the Greeed approaches a human and asks what the human desires, a coin slot called a Medal Insert Slot, which is also used on the Ride Vendor, appears on the human, and after the Greeed inserts a mystical object called a Cell Medal into the slot, a monster called a White Yummy is formed from the human.

Being the incarnation of its host desire, a White Yummy physically devours that person's object of desire and "digests them" into Cell Medals. Once consuming enough, a White Yummy transforms into a complete Yummy, modeled after the animal on the Cell Medal.