Sonic Underground (1999)

S1E19 The Jewel of the Crown

Title: The Crown's Treasure Plot: Robotnik is determined to seize Queen Aleena's precious crown jewel, which shines brightly as it approaches her. Sonic, Manic, and Sonia devise a plan to retrieve the jewel from its merchant owner, aiming not just to reunite with their mother but also to safeguard her. As the Hedgehogs secure the jewel and embark on their journey, its brilliance intensifies the nearer they get to their goal, fueling their hopes of locating the Queen and bringing her home.