The Great Potato is the holiday king of Leprechanuka. It comes to people who believe in it and make good deeds.
The Great Potato is the holiday mascot of Leprechanuka, and is known for helping the needy and gifting chocolate coins. In Leprechanuka, he asks his mirror if he is the fairiest of all potatoes, and if he isn't the hotter looking potato gets a poisonous apple, much like in Snow White. Although Cosmo was the only one who believed in it, when they were being cooked in a cauldron by the McPunchies, he showed up and burned the McPunchies for cooking people on Leprechanuka, and freed them. He also mentioned he turns back into a pumpkin after Leprechanuka, making a reference to the Great Pumpkin from the Charlie Brown special, "It's the Great Pumpkin, Charlie Brown".
It is a potato, and wears a black belt with a gold buckle, black framed glasses, green shoes, a green hat, and white gloves.