Silver tells Espio that Eggman Nega wants to unleash an evil monster called the Ifrit to destroy the world, and that the Ifrit needs to consume Chao to become invincible. Before he can tell him, Eggman Nega appears and fights against Sonic and Shadow, who defeat him. Sonic fights Shadow while Tails races Metal Sonic.Д®ggman tells Shadow that he knows who Eggman Nega was secretly communicating with.

Silver exchanges some rings to Knuckles for the Chao he collected, while Rouge races against Espio.Дisguised as Eggman, Eggman Nega tells Metal Sonic to go after Sonic and Tails. KnucklesвЂ™s Emerald Detector runs out of juice and he needs rings to power it. They decide to follow Knuckles and Rouge, with Espio distracting Rouge so Silver can get some Chao from Knuckles. Silver tells Espio that he is trying to hide the Chao in a safe place, and Espio officially joins forces with him.

They run into Shadow and Metal Sonic, and suspect trouble due to the presence of Metal Sonic. Sonic and Tails read pages from Eggman NegaвЂ™s book that mentions something called вЂњthe IfritвЂќ. Knuckles and Shadow fight Eggman Nega off with a similar mech, with Knuckles destroying the mech and getting the Emerald Detector. Sonic and Silver fight Eggman Nega off again. Rouge and Knuckles decide to find Eggman NegaвЂ™s Emerald Detector.Д®spio accuses Silver of being behind the missing Chao, and Silver says he hid them to save the world. Sonic and Tails race Silver and Espio, looking for Chao while Shadow and Metal Sonic race Knuckles and Rouge in search of Chaos Emeralds. Silver and Espio become interested in Sonic and Tails looking for Chao. When Shadow, Metal Sonic, and Silver confront Eggman, the real Eggman speaks through Metal Sonic and identifies the Eggman they are fighting as Eggman Nega, disguised as Eggman. Sonic, Tails, Knuckles, and Rouge confront Eggman, who claims to have nothing to do with the missing Chao, and attacks them inside a mech, but they defeat him. Shadow and Metal Sonic race against Silver and Espio to get to Eggman first. While meanwhile, Eggman speaks to Shadow through Metal Sonic, whom he has reprogrammed as more of a mindless servant, telling him that he should help him in order to save the world. Vector tells Espio that Chao have disappeared since Silver reappeared from the future, and suspects him of it. Sonic and Knuckles are determined to reach Eggman first, so it becomes a race and even a knockout fight between Sonic and Tails vs. Meanwhile Sonic and Tails are looking for missing Chao. The Master Emerald is stolen again, and Rouge offers to help Knuckles look for it.

Sonic rivals 2 silver