

Sonic and Tails take all the Chao to a Chao Garden, and Knuckles finds the Master Emerald in the Emerald Detector that he and Rouge stole from Eggman Nega. Metal Sonic reveals that the seventh Emerald was stored in his chassis and he and Shadow use Chaos Control to exit that world. Shadow and Metal Sonic close the portal and seal themselves and Eggman Nega in Ifrit's dimension. Despite possessing Sonic, Tails, Knuckles, and Rouge (depending on who the player plays as), the Ifrit is defeated by the other teams. Despite Rouge only collecting six of the Emeralds, the portal opens anyway and Nega dispatches his new Metal Sonic version 3.0 to awaken the Ifrit. Eggman uses Metal Sonic as a communication device to aid Shadow along the way.Īll of the teams meet up at the Mystic Haunt Zone where the portal to Ifrit's world is. Nega has learned of the Ifrit by accessing Professor Gerald Robotnik's journals, and Shadow and Metal set out to get the Chaos Emeralds before he does. Eggman sends Metal Sonic to find Shadow the Hedgehog, and lets them know of Nega's plans. He crosses paths with Espio the Chameleon, who is also on the case of the missing Chao, and they work together to save the world. In order to make a new future, he steals the Chao that are left in order to hide them. Meanwhile, Silver has returned from a now ruined future caused by the Ifrit. The Master Emerald has also gone missing (again) and Knuckles the Echidna teams up with Rouge to find it.

Eggman Nega thusly hires Rouge to collect the Chaos Emeralds. However, to open the portal to Ifrit's world, the seven Chaos Emeralds are required. After that, he plans to release the Ifrit into the world in order to destroy it. His plan is to feed them to an inter dimensional beast called the "Ifrit" who needs to eat them to become invincible. It turns out that Eggman Nega (once again masquerading as Doctor Eggman) has stolen the Chao and hidden them inside a haunted mansion. The Chao have gone missing and Sonic the Hedgehog and Miles "Tails" Prower immediately get on the case to find them.
