Sonic Underground (1999)

S1E26 Wedding Bell Blues

Robotnik reveals his intention to marry Queen Aleena, aiming to claim the throne of Mobius. Disturbed by the idea of their enemy becoming their stepfather, Sonic, Manic, and Sonia grow wary, suspecting the wedding might be a ruse. To uncover the truth, they team up with Bartleby and take on the role of musicians for the ceremony. Dressed as 18th-century performers, the siblings infiltrate the wedding, determined to locate the Queen and expose Robotnik's deceitful scheme.