The Forbidden Box is a miscellaneous item in Shining in the Darkness. When used during a battle, it produces a random effect. After many uses cracks will form in the box and it will need to be repaired.
- "(character using the box) suddenly feels dizzy!" - The character who opens the box falls unconscious.
- "Lightning flashes from the box!" - There is an explosion among the enemies faced, sending them flying off the screen, and the battle is won.
- "The ground quakes violently!" - The screen shakes and all enemies are damaged.
- "The air resonates to a strange melody
- "A witch appears from within the box!" - A witch on a broomstick flies across the screen, casting the 'quick' spell.