The term 'Jellystone Bear' refers to the character YOGI Bear, a cartoon bear created by Hanna-Barbera Productions in 1958. YOGI is a smart and mischievous bear who lives in Jellystone Park and is always trying to steal picnic baskets from unsuspecting campers. He is accompanied by his faithful sidekick, Boo Boo. YOGI is often seen wearing a hat and tie, and is known for his catchphrase, 'I'm smarter than the average bear!'