On the map screen enter
UP, RIGHT, L2, L2, DOWN, R2, R2 UP, DOWN, R2, L2, RIGHT, LEFT, CIRCLE, CIRCLE, CIRCLE.

• Growlanser II - Bloopers: Finish the game on any storyline
• Growlanser II - Character's Room: Finish the game on any storyline
• Growlanser II - Sandra's Story: Finish the 'Feline Fascination' sidequest and you will be given it
• Growlanser II - Sound Test: When you're going through Wolfgang's story, he'll ask you to send out negotiators. First select Dozz, then Simon. Later, Wolfgang will give you the Sound Test.
• Growlanser III - Bloopers: Finish the game on any storyline
• Growlanser III - Character's Room: Finish the game on any storyline
• Growlanser III - Sound Test: Finish the game on any storyline
• Growlanser III - Special Character Images: Finish the game and get an ending with a character to unlock their corresponding special image.
• Growlanser III - Special Character Images: Finish the game on any storyline