Color Dungeon

A special dungeon in Link's Awakening DX that took advantage of the Game Boy Color's abilities and rewarded the player with a blue or red tunic when completed. The former reduces damage taken by half, and the latter doubles damage dealt. To enter it, you need to solve the tombstone puzzle in the Graveyard, then tell each guard what color tunic they're wearing.

http://www.youtube.com/watch?v=OWeQ8Xo6Ank