It was used by the pirate Captain Nathaniel Flint to hide his treasure. Dr. Delbert Doppler soon set out on a mission to find Treasure Planet by hiring the pirate John Silver and his crew, under the command of Captain Amelia. All of Silver's crew members wanted the treasure that Flint hide in the center of the planet. Marika Kato, Chiaki Kurihara, Mami Endo, and the Hakuoh Academy Space Yacht Club search for Treasure Planet.
In truth, however, Treasure Planet was never really a ordinary planet at all. Rather, it was a artificial planet of a vast spheroid-shaped mechanism created by an ancient alien race, composed of incredibly advanced technology. A spherical map inputted into the right slot opens up a portal to anywhere in the universe. Flint somehow commandeered Treasure Planet's technology to go across the universe stealing treasure. The slash of treasure is at the center of the planet, accessible only via the portal.
To make sure no one could steal Flint's treasure, the entire planet was rigged to explode which led to its demise after Sliver and his crew triggered a booby trap that Marika, Dita, Hibiki and their friends try to avoid. Silver and his pirates triggered this booby trap and were forced to flee the planet on the R.L.S. Legacy. However, flying debris damaged the ship's motive power and it couldn't escape so Jim Hawkins used the planet's portal to get them to safety after changing the destination. Moments after the ship fled to safety through the portal, Treasure Planet exploded behind them while the crews of the Bentenmaru, the Barbaroosa, the Odette II and the Nirvana observed the destruction from a safe distance.
Treasure Planet resembles the planet Saturn because of it's rings which glow a bright green color. The surface of the planet is very jungle-like and also desert-like. Its destruction is similar to the destruction of Gaea in Titan A.E.