Final Fantasy 6 Advance Codes -

Bestiary:
Save the game at any option to unlock the "Bestiary" option at the "Extra" menu.

Music Player:
Successfully complete the game to unlock the "Music Player" option at the "Extra" menu.

Dragon's Den dungeon:
Defeat the eight Dragons in the World Of Ruin to unlock this hidden dungeon in the northwest part of the world map.

Soul Shrine dungeon:
Complete the Dragon's Den and finish the game. This bonus dungeon will be unlocked on one of the small islands north of Mobliz.