Question: What disappeared in "Sonic Chronicles" after the defeat of the main antagonist of the series?
Sentence (from "Doctor Eggman"): Dr. Ivo "Eggman" Robotnik (ドクター・エッグマン , Dokutā Egguman , ロボトニック "Robotonikku") is a fictional character and the main antagonist of Sega's "Sonic the Hedgehog" series.
Relevant evidence: Yes