A Chilling Discovery

"A Chilling Discovery" or "The Battle of Ice Palace" (アイスパレスの戦い) is the 57th epsode of Sonic X.

Plot
With the help of Chris' new program, the Blue Typhoon spots a Chaos Emerald on planet Freezy. The Blue Typhoon approaches planet Freezy, but it's attacked by a Metarex and it crashes on the planet. Sonic, Chris, Knuckles and Cosmo decide to go get the Chaos Emerald with the X-Tornado because Blue Typhoon is damaged. Rouge is also on her way for getting the emerald before Sonic. Everybody has to fight Metarex before reaching an ice palace, where the emerald is supposed to be located. Sonic's group find it, but it's sealed in a solid ice block. A more powerful Metarex appears and gets power from the emerald to become even stronger. A fight engages and Cosmo finds the way to defeat it with a laser beam. The laser from Blue Typhoon defeats Metarex. Planet Egg gets trashed into planet and the snow disappears. Knuckles finds the Chaos Emerald but before he gets it, Rouge steals it. However, Tails discovers that the emerald was a fake one.