Sonic the Hedgehog: Jewels of Infinity (also known as Sonic the Hedgehog 5: Jewels of Infinity) is an upcoming game developed by BT Studios and a turn based game based on the infamous "Fastest Thing Alive", Sonic the Hedgehog, joins forces with Dr. Eggman to save the world from the Chaos Emeralds and Master Emerald, who are possessed with dark magic by Zonic the Hedgehog. A dark magician recolor hedgehog who's fur color is black and stripes that are orange (red in combat) who is here to destroy Mobius and take the emeralds for himself.
Sonic and Tails are resting at Emerald Beach after defeating Eggman after the events of Sonic the Hedgehog 4. But it turns out that Eggman didn't actually died after those events. Now he vows for revenge on Sonic, he sends out Metal Sonic to face Sonic. Sonic beats his metal doppleganger and faces Eggman himself. Sonic was actually defeated by Eggman by his Death Egg Laser move. However, not long enough, a mysterious black, orange striped recolor hedgehog. It turns out that he is willing to take the emeralds for himself and use its power to destroy Mobius. Eggman decides a "truce" to Sonic. They then went to find Knuckles.
As they reach Angel Island, Knuckles found out that Eggman is with Sonic. Knuckles attacked Eggman and was defeated. Sonic tells Knuckles that Eggman decided a "truce" to help defeat the mysterious hedgehog recolor who has possessed the emeralds with his dark magic.