Nintendo DS Software Sid and Chocobo-no Fushigi na Dungeon.

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

An unforgettable story of the city of oblivion.
Treasure hunters Chocobo and Sid get lost in the "City of Forgetting Time" which is believed to be "happy by forgetting". In that city, people forget various memories every time the Clock Tower bell rings.
Raphael, a mysterious boy who appears in such a city, creates a memory labyrinth and brings back people's memories. And the great secret hidden in this city is revived.
Dungeon RPG clears the labyrinth to bring back the memories of the people in the city.
For players who want more of a dungeon game, the DS version also includes enhanced elements of dungeon meddling.