Dee Ess Island
Dee Ess Island is one of the many islands on Phantom Hourglass. It is located on the southeastern quadrant of the sea. This island was made to highly resemble a Nintendo DS (its name being an obvious pun) and you can also play a game called the Goron Game.
Goron Game
The Goron Game is playable after you get the letter from Gongoron saying he got a part time job at a nearby island. To get this letter, you must visit Goron Island after leaving it for the first time. The Goron Game consists of rolling Gongoron around in order to collect diamond shaped objects. Once this task has been completed, a door will open, and Gongoron will then proceed down a short spiral where he will attempt to beat Link in a race-like game to the finish line. Like all minigames, if your time is higher then the previous score, You will receive a prize.