The Gallery of Time is the final dungeon in Dark Cloud. It is accessed from within Dark Heaven Castle. Dungeon floors travel progressively back through time, to the events of 400 years ago, where Toan has a chance to stop the Dark Genie from ever being born. There are 25 floors in the dungeon. The Gate Key item is called Clock Hands. The locked door key item is the Pitchdark Key. Back floors are unavailable in the English release of the game, as the Flapping Duster item was not added. Access to the final boss becomes available after completing all the Dark Heaven Castle Georama events.
There are a total of 25 floors within the Gallery of Time, which are indicated by dates, ranging from '5 years ago' to '400 years ago'. Floors 1 through 18 have Atla available to be collected, and will randomly contain limits such as draining Thirst more quickly, or reducing the ABS from your weapons when you attack, making them tougher to complete. The floors 19 through 23 can only be attempted with the characters Xiao, Goro, Ruby, Ungaga, and Osmond respectively. Floor 24 is the last where Atla can be found, and progression after it requires for all Georama parts to have been assembled and viewed. Floor 25 is where the boss, Dark Genie, can be found.