Color Dungeon

The Color Dungeon is a plot-independent dungeon exclusive to Link's Awakening DX, the only dungeon in the game made purposefully to be used in tandem with the Game Boy Color's enhanced image card. Unlike the other dungeons in the game, it is short in length and considered easier than those in the main quest by the community. Link can enter the dungeon as soon as he obtains the Pegasus Boots from the third dungeon, Key Cavern.

Entrance to the Dungeon
In the library of Mabe Village, an unreachable book high on a bookshelf gives directions as to locating and revealing the dungeon's entrance. By dashing into the shelves with the Pegasus Boots, the book will fall to the floor. At the Cemetery of Koholint Island, southwest of the Tabahl Wasteland, the book instructs Link to push gravestones in a specific order; by following the book's directions, the entrance reveals itself under the last disturbed gravestone. However, before Link can enter, three skeletal guards stand in his way; he must describe to them what color of tunic each is wearing. Upon three correct answers, admittance is granted.

With a bit of luck, the Color Dungeon can be accessed without the Pegasus Boots or the Library's navigational book, as the gravestones can be moved at anytime. Inside the dungeon, however, the Power Bracelet is required to complete some puzzles, and Magic Powder is an item vital to defeating one of the dungeon's mini-bosses, Giant Buzz Blob. The dungeon's other miniboss, Stone Hinox, exhibits a more mechanical appearance in comparison to the versions found all across Koholint Island; this incarnation can rain boulders from the ceiling, as well as throw bombs like the original.

Themes and Navigation
To be expected, the dungeon incorporates many color-based puzzles; because only the Game Boy Color has the image card necessary to produce the hues and tints of the Color Dungeon, this aspect of the game cannot be accessed at all if the game is to be played on anything other than a Game Boy Color. In some rooms, Link must walk on tiles in order to change their color; in others, he must hit switches to harmonize colors, or throw Karakoro enemies into matching-color holes to progress. Like the puzzles, few enemies are exclusive to this dungeon, including the Bone Putter, Camo Goblin, and Karakoro.

The reward for clearing this dungeon is not an instrument, but rather Link will meet a Great Fairy who offers him "the power of color", a new-found strength embodied in either the Red Tunic or the Blue Tunic granted by the Great Fairy herself. The Blue Tunic increases Link's defense; he will take less damage in battle when it is worn (similar to the Guardian Acorn). The Red Tunic increases Link's sword attack strength (much like a Piece of Power, sans speed bonus). Link has the option of clearing the dungeon again to switch between the tunics, but he can never revert back to his Green Tunic after his first successful completion.

Unlike the rest of the dungeons in Link's Awakening, completing this dungeon has no effect on the overall plot and is entirely optional.

Trivia

 * The Color Dungeon cannot be accessed while Link is tied to his quest, i.e. in the middle of another dungeon, etc.
 * The theme played during Link's voyage through the Color Dungeon is a remixed version of the dungeon theme from the original The Legend of Zelda.