Question: What disappeared in "Sonic Chronicles" after the defeat of the main antagonist of the series?
Sentence (from "Doctor Eggman"): After the creation of Sonic the Hedgehog, Ohshima chose to use his previous egg-shaped character to create the antagonist of the 1991 video game, "Sonic the Hedgehog", as well as making him become the archenemy of the series' titular main character.
Relevant evidence: No