Trouble 3 is an indoor level, it is the dungeon and the lowest point of the castle visited in this game. It is the only level in the game, of which there is only one exit,and you have to leave the way you entered. It is considered by some, along with Shield 2 to be 'The Face of Dark Castle'. It is the third level on the Trouble Level Path, in Dark Castle. It has shown up in Dark Castle, and Color Dark Castle, and will show up in Return to Dark Castle.
Levels on the Path
Main article: Trouble Level Path