Sparcium is a metal alloy suitable for constructing complex electronic components, such as microchips and AI processors. It is also very rare, making it highly valuable.
Years ago, several Tomatopotamus 2 game cartridges, each containing a microchip made of Sparcium, were produced. However, when the Sparcium chips proved more valuable than their cartridges, nearly all existing copies of the game were recalled and melted down.
In the present day, Sonic got his hands on a Tomatopotamus 2 cartridge with its original Sparcium microchip, while Eggman would make an Sparcium-based AI processor for FiendBot. When the benevolent FiendBot's AI processor got destroyed, Team Sonic used the Sparcium in Sonic's cartridge to replace it.
- Sparcium's name is a prortmanteau of the word "sparse" and the "-cium" suffix.