A package addressed to Shinichi Kudo arrives. Inside, there is an invitation to the "Detective Theme Park" and a popular set of "Riddle Cards" loved by children. The sender's name on the mysterious package, whose intentions are unclear, is "Sphinx"...

Surrounding this "Sphinx," a series of incidents begin to unfold one after another. What is the true intention of Sphinx? What do the Riddle Cards imply? This time, Conan is different from before!

The great detective Conan makes his debut on the Game Boy Advance! Incorporating numerous replayable mini-games, the game intertwines Conan's unique and intricate storyline. It also offers plenty of elements to delve into, such as collecting rare images and Riddle Cards.