The legendary Chaos Emeralds are the ultimate power source in the Sonic universe, and in Sonic Frontiers, they are essential for transforming into Super Sonic. Each island holds a set number of Chaos Emeralds, locked away in vaults that require Vault Keys to open. Collecting all Chaos Emeralds on an island is a prerequisite for facing its respective Titan Guardian. Without them, you won't be able to unleash Super Sonic's full power and defeat the colossal threats.
