Sphere
A sphere (Japanese: タマ tama) is the basic unit of currency in the Underground of Sinnoh. They come in five colors: Red, Green, Blue, Prism, and Pale. These correspond to different versions of the Pokémon games, with the first three matching the original colors of Red, Green and Blue, and the Prism and Pale spheres corresponding to Diamond and Pearl respectively.
Spheres of these five colors can be found commonly by mining in the Underground. More common are those that are Red, Blue, and Green, while the Pale and Prism spheres are quite rare. Spheres can range in size from 1 to 99, though most spheres found will be in the range of 5-20.
To get larger spheres, they must be either combined by burying more than one of the same color sphere in the same spot. When combined, the size of the resulting sphere is determined by the following formula...
- X + (a⁄5+1) + (b⁄5+1) + (c⁄5+1)...
Where X is the size of the largest sphere buried, and a, b, c, and so on are the sizes of the other spheres. All non-integer values are rounded down before the adding. In the event of a tie for the largest size, the largest sphere size is used both as X and one of the other variables. For instance, burying a Prism Sphere 15, a Prism Sphere 12, a Prism Sphere 7, and two Prism Sphere 1s produces a Prism Sphere 22.
Buried spheres can also naturally grow over time. Red, Green, and Blue Spheres grow faster than Pale and Prism Spheres. Regardless of what a player does, though, the maximum level for a sphere is 99.
Spheres can be used to purchase many things that a player will need to decorate their secret base, as well as traps which can be set up throughout the underground. Hikers that stand at some of the corners of the Underground will offer to trade these items for the spheres. The price that the item is listed for is the minimum size sphere that the hiker will take for it, though larger ones may be used.
