Set in the alternate universe, where Sonia is put in Robotnik's holding cell during the episode: Wedding Bell Blues.

The magenta colored hedgehog named Sonia gets captured by Sleet and Dingo.

Sonia: Let me out of here.

Sleet and Dingo: Come on, you're going to take medicine.

Sonia: No! I'm better! No!

Dingo: But you're sick! You have got to take medicine.

Sonia: Please, no! Please! (takes medicine that is actually poison)

Manic and Sonic rescue Sonia, but they find that Sonia is dying.

Sonia: That medicine is poison. Manic, Sonic, you guys continue your quest to find your mother without me, goodbye... (she dies)

Sonic and Manic are heartbroken because their sister died.

Manic: Goodbye, Sonia the Hedgehog.

Manic pulls off Sonia's medallion and he and Sonic leaves their dead sister behind. When they tell Bartleby the bad news, he is anguished.

Bartleby: Poisoned?! But that's impossible!

Queen Aleena sensed Sonia's death and tells the fellow Mobians.

Queen Aleena: The actions led to that event will no longer be tolerated since the death of my daughter. That bottle of poison must be destroyed.