Sonic Rivals 2 features eight playable characters, including all five characters from the previous title. Silver returns to what he hopes is a happy future while Espio has to answer to Vector the Crocodile who has spent their client's advanced payment on late rental fees. Rouge steals the Master Emerald and runs. Sonic and Tails save all the Chao and bring them to a Chao Garden and relax there while Knuckles finds the Master Emerald in the Emerald Detector that he and Rouge stole from Eggman Nega.

Shadow uses the Emerald to teleport back with Metal Sonic. However, Metal Sonic tears his chassis open, revealing the 7th Chaos Emerald. Shadow and Metal Sonic destroy the Ifrit and close the portal but they and Eggman Nega are trapped in the Ifrit's dimension. Despite possessing the minds of 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 newly copy of Metal Sonic, Metal Sonic 3.0 to awaken the Ifrit. Eggman uses Metal Sonic as a communication device to aid Shadow along the way.Р”Р„ll of the teams meet up at the haunted mansion where the portal to the Ifrit's world is. Nega has learned of the Ifrit by accessing Gerald Robotnik's journals, and Shadow and Metal Sonic set out to retrieve the Chaos Emeralds before he does. Eggman sends Metal Sonic to find Shadow, and tells him of Nega's plans. Then, they work together to save the world. Espio first thought that Silver was hiding Chao for a cause of evil, but Espio finds out that Silver was trying to save the world. In order to make a happier future, he searches for and steals the Chao that are left in order to hide them. Meanwhile, Silver the Hedgehog 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 secretly hires Rouge the Bat to collect the Chaos Emeralds. However, to open the portal to the 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. Eggman) has stolen the Chao and concealed them inside a haunted mansion. It turns out that Eggman Nega (once again masquerading as Dr. The Chao have disappeared and Sonic the Hedgehog and Miles 'Tails' Prower immediately get on the case to find them.

Sonic rivals 2 silver