The Hidden Treasure is a magic item exclusive in the Pirate Seas Adventure Pack. It adds a radar to the screen which displays 3 circles. The closer the treasure is, the more circles will appear. When the chest is really close, it will make a sound and then pop up from the ground. There is a limit of 3 hidden treasures in each level. If all have been found, the item is no longer useful.
- There is a glitch where if you collect a Hidden Treasure in the Ruins, then talk to someone, the chest will reappear, causing a near infinite source of money. This only works on the Wii version. This has been fixed in Giants, with the treasure not appearing at all in the main hub.
- In Giants, the Hidden Treasure can only be used once while the player is in that level. If he/she wants to go for another treasure chest, he/she must restart that level.
- For some reason, in the Xbox 360 version of Skylanders: Spyro's Adventure, the treasure chest does not work well in the Darklight Crypt. Even when the player gets to the treasure, it cannot be accessed.