Question: What disappeared in "Sonic Chronicles" after the defeat of the main antagonist of the series?
Related documents: [0]  [DOC] 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. His original character designer was Naoto Ohshima, who created the character as part of many design choices for the company's new mascot. 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. [END] 
[1]  [DOC] Sonic Chronicles: The Dark Brotherhood (Japanese: ソニッククロニクル 闇次元からの侵略者 , Hepburn: Sonikku Kuronikuru: Yami Jigen Kara no Shinryaku sha , lit. "Sonic Chronicles: Invaders from the Dark Dimension") is a role-playing video game developed by BioWare and published by Sega for the Nintendo DS. The game was BioWare's first handheld video game project, and is a part of the "Sonic the Hedgehog" series. "Sonic Chronicles" initially focuses on the events surrounding the kidnapping of Knuckles and the disappearance of the Chaos Emeralds after the defeat of Doctor Eggman, before moving on to follow the cast of characters across two dimensions as they encounter a new ally, Shade the Echidna, and seek to stop the invasion of their world by Ix, the leader of Shade's tribe, the Nocturnus. [END] 
Answer: 
the Chaos Emeralds
the Chaos Emeralds