Final Fantasy Fables: Chocobo's Dungeon Cheats

Jukebox in Dardola's Dineing
At some point in the game (I believe around Chapter Four) Head to Dardola's Dining and talk to Dardola (the guy with the green hair). The Bell will ring and he will lose his memories. Hop in his head and complete the dungeon. After this, He will make the jukebox in his shop available and you can now listen to the music in the game!

JukeBox: Complete Dardola's Memories Bonus Dungeon

Additional Dungeons
After completing the game, there are two new dungeons available immediately.

Chocobo's Memories (Standard Dungeon): Accessed through the Chocobo statue in the park
Croma's Future (Special Dungeon): Accessed through Croma in Stella's House

Obtain all Jobs
Jobs are like Classes. You begin with the 'Natural' job and there are 9 others to get during the game.

Black Mage: Make it to 10F in Guardian of the Flame
Dancer: Enter 'Pirouette' (capital P at the beginning, the rest lowercase, AND a musical note at the end) as a Romantic Phrase
Dark Knight: Defeat Croma Shade oin 30F in Guardian of the Light
Dragoon: Complete Meja's Memories
Knight: Complete Freja's Memories
Ninja: Complete Volg's Memories
Scholar: Defeat the four elements in 20F Guardian of the Water
Thief: Steal the item behind Merchant Hero X in any of his dungeon shops
White Mage: Complete Pastor Roche's Memories