Materials

Materials are collectible substances used to construct naval vessels, RC Vehicles, buildings, and other related purposes. These objects first appeared in Sonic Rush Adventure before returning in Sonic Lost World. In the games, materials is automatically obtained after the player clears an Act/Stage or defeating a boss. The amount of materials the player gets from completing these tasks is solely depending upon the Rank. These items also come in different shapes and colors, which is corresponds to each Stage.

In Sonic Rush Adventure
In Sonic Rush Adventure, Materials play a prominent role in the game. With a book provided to him by Marine the Raccoon, Tails learns of a technology to create navy vessels and other constructions by combining materials. After he gained understanding of the technology, Tails successfully created these to help the others traverse to different islands. There are a total of nine different types of Materials in the game.

In Sonic Lost World
In the Nintendo 3DS version of Sonic Lost World, Materials are used by Tails to create RC Vehicles and/or "upgrading" Tails' Lab (which is essentially making the lab bigger in size). There are a total of ten different types of Materials in the game.