Voir Adventures of Sonic the Hedgehog, Season 1, Vol. 1 - Episode 13

Sonic rescues Lucas, a rival of Robotnik's, from Robotnik's dungeons. But Robotnik will do anything to keep Lucas from finding his lost love, Lucinda, including proposing to her himself. When she says yes, Robotnik is happily surprised, till the wedding veil is removed, to reveal Sonic.