Another entry in the Wagamama Fairy Mirumo de Pon series for the Game Boy Advance, this title, "Nazo no Kagi to Shinjitsu no Tobira," translates roughly to "The Mysterious Key and the Door to the Truth." Published by Caravan, it's highly probable this game shares gameplay elements with other games in the series. It suggests a puzzle-adventure style with a mystery element, perhaps involving solving riddles and searching for clues using the "mysterious key" to progress.  The game's Japanese-only release limits readily available information on its gameplay mechanics.

Wagamama Fairy Mirumo de Pon Nazo no Kagi to Shinjitsu no Tobira (J)(Caravan)

Wade Hixtons Counter Punch (U)(Independent)