『ドキドキ魔女神判DUO』 (Doki Doki Majo Shinpan Duo) is a Japanese Nintendo DS game developed by Marvelous Entertainment and released in Japan on May 31, 2007. It is a sequel to Doki Doki Majo Shinpan, which was released in 2006. The game is a puzzle-solving adventure game where players take on the role of a magical girl detective and investigate strange occurrences in a fantasy world. Players must investigate the mysteries of the world by utilizing the touch screen and microphone of the Nintendo DS. The game features a variety of puzzles and mini-games. Players must use their detective skills to search for clues, interview witnesses, and solve puzzles. The game also features a variety of special abilities which can be used to help solve the mysteries. These abilities include the ability to transform into different characters, cast spells, and fly. The game features a variety of cute and whimsical characters, such as a witch, a fairy, and a robot. The player can also customize their character with a variety of outfits and accessories. The game also features a variety of locations, including a town, a forest, and a castle. Overall, Doki Doki Majo Shinpan Duo is a fun and charming puzzle-solving adventure game for the Nintendo DS. It features a variety of puzzles, mini-games, and unique characters. Players can enjoy the game's whimsical and cute visuals, as well as its unique and challenging puzzles.