The Frenzy Stone
The Frenzy Stone is the main gem of Sonic Frenzy
Conceived in writing first in the Press Garden Zone and later created and powered in the Marble Garden Zone, this gem's main purpose is to keep the Chaos Emeralds under control, to prevent them from releasing too much energy even if their energy is used by another being, storing it for its own use instead. Unfortunately for Sonic, Tails and Knuckles, that's what Robotnik's after in Sonic Frenzy.
Conceived in writing first in the Press Garden Zone and later created and powered in the Marble Garden Zone, this gem's main purpose is to keep the Chaos Emeralds under control, to prevent them from releasing too much energy even if their energy is used by another being, storing it for its own use instead. Unfortunately for Sonic, Tails and Knuckles, that's what Robotnik's after in Sonic Frenzy.
"Yo, have you played Sonic Frenzy? I just got to the bit where Robotnik steals this strange gem from the Starry Solstice, I think it's called the Frenzy Stone or something?"