At the port where the Queen Fury is docked in Fueno, if you walk to the front of the screen where the crates in the foreground are and press X, Dart will break the fourth wall and wave to the player.
Contributed by MehDeletingLater
During development, Shirley was going to be an optional boss along with the other Dragoons in Vellweb. However, due to the White-Silver Dragoon's ability to heal 100% of its health while also having an unlimited MP supply, the boss was cut from the title as it was considered an unbeatable fight. The data for this battle can still be found on the game's disc.
Contributed by DrakeVagabond
Within the game's data are 2 unused maps and an early model for Dart, featuring orange armor and long boots.
Contributed by DrakeVagabond