Klepto Ruins is one of the places in Mario Party Advance. It is located in the Desert Area of Shroom City, but can only be accessed by a pathway at the entrance to the Seaside Area.
When the player decides to stop here, they will meet Mr. E, who is confronting Klepto about a secret treasure. His quest, Treasure of Mystery!, involves getting opening Klepto's treasure chest by guessing the correct four-number combination. If the player gets it right, Mr. E will be fascinated. But then, he automatically loses interest and leaves, leaving Klepto to reward the player with the Gaddget, Map Maker.