The Compass is a recurring Dungeon Item in The Legend of Zelda series. The Compass locates the Boss and Treasure Chests in dungeons. However, it has a different use in every game it appears in. The Compass appears in numerous games, and it is a very useful item. There is always one Compass in every dungeon.
The Legend of Zelda
The Compass in The Legend of Zelda is used to find the location of each Triforce Shard that lies within any and all dungeons in the game. However, in Death Mountain, the final dungeon of the game, it cannot be used to locate a Triforce Shard because Link has already collected them all. Instead, it is used to show where Princess Zelda lies in the dungeon via a blinking dot on the map. It is usually found at the beginning of the dungeon to give players a sense of where to go.
A Link to the Past
The Compass in A Link to the Past displays the location of the Boss on the map. It also displays what floor Link and the Boss are on.
The Compass in Link's Awakening displays the location of each Treasure Chest and the Nightmare. However, it also has a new feature; it beeps whenever Link enters a room with a Small Key or some other secret.
Ocarina of Time and Majora's Mask
The Compass in Ocarina of Time displays the locations of all Treasure Chests in dungeons on the map. It also displays the location of the Boss. In addition, it displays Link's location on the map and also marks what door he entered from. It is identical in use and appearance to the Compass in Majora's Mask.
Oracle of Seasons and Oracle of Ages
The Compass in Oracle of Seasons and Oracle of Ages tells Link where all Treasure Chests are located in each dungeon. It also displays where the Boss is located. Similar to the Compass in Link's Awakening, this version of the Compass beeps whenever Link enters a room that has a Small Key in it.
The Wind Waker
The Compass in The Wind Waker displays the locations of Treasure Chests and the location of the Boss. In the Tower of the Gods, the Compass also displays the locations of the Servants of the Tower. Similarly, in the Earth Temple and the Wind Temple, the Compass displays the locations of Medli and Makar, respectively.
The Minish Cap
The Compass in The Minish Cap displays the locations of Treasure Chests and the Boss.
The Compass in Twilight Princess has the exact same use as the Compass from Ocarina of Time. It reveals Treasure Chests and the Boss on the map, and displays Link's location. However, it has a more advanced use in this game; it displays the location of certain items in each dungeon, and this item depends on which dungeon Link appears in. In the Forest Temple, it displays where each caged Monkey can be found. In the Snowpeak Ruins, the Compass displays the location of every Cannonball in the dungeon. Also, in the Temple of Time, the Compass displays the location of the Ancient Statue that Link requires to reach the Boss, Armogohma. And, last but not least, in the Palace of Twilight, the Compass displays the location of the two Sols. This Compass is by far the most useful one in the series.
A Link Between Worlds
The Compass in A Link Between Worlds makes all unopened Treasure Chests in a dungeon appear on the map. Every dungeon has a Compass inside, usually located within a Treasure Chest.
Million Publications Strategy Guide artwork of the Compass from The Legend of Zelda