P-O-X is a handheld electronic game released by Hasbro in 2001. The game focuses on creating and customizing creatures called "POX Infectors" and using them to battle against other POX Infectors. The game includes both single-player and multi-player modes and a 30-foot (9 m) wireless connection range. P-O-X was introduced through a viral marketing scheme. Hasbro asked kids in Chicago schools, "playgrounds, skate parks and video arcades" who they thought the "coolest kid" was, until they found kids who felt they were "the coolest" themselves, and distributed free copies of the game to them.