Chaos Emeralds
From Sonic Retro
Seven(or six in Sonic 1) mystical emeralds that allow Sonic to transform into Super Sonic when used in conjunction with fifty Rings.
They are also used as plot points in several games.
Seven(or six in Sonic 1) mystical emeralds that allow Sonic to transform into Super Sonic when used in conjunction with fifty Rings.
They are also used as plot points in several games.