Ray Rizzo, a Drake University sophomore, successfully defended his 2010 title in a competition that featured 400 players Aug. 12-14 in San Diego, The Philadelphia Inquirer reported Thursday.
Rizzo, who hails from Marlton, Pa., but goes to school in Des Moines, Iowa, says he's been playing Pokemon since he was 6 years old.
The game involves 640 different characters and players must choose a team of Pokemon to battle against an opponent's team. Each Pokemon has its own set of powers and skills.
As world champion, Rizzo was awarded a $7,500 scholarship and a paid trip to next year's competition in Hawaii.