In Yu-Gi-Oh! 5D's World Championship 2010: Reverse of Arcadia, Duel Puzzles are encountered in three places: 1. * Inside the training facility next to the main Arcadia Movement building (talk to Check). 2. * Inside Bootleg - the bar in the Daimon Area of New Domino City (talk to Owner). 3. * Via the 'Tutorial' menu in World Championship Mode, although these duel puzzles are downloaded via Nintendo Wi-Fi Connection, and so the heading 'Duel Puzzle' will only be there if you have downloaded at least one of these puzzles.