After defeating Black Doom and Tom and his wife Maddie having the baby that makes Sonic a big brother, he arrives at the kingdom near the island called Soleanna and saves a princess named Princess Elise the Third from Dr. Robotnik with his henchmen Agent Stone, Metal Sonic, Orbot and Cubot and a newest member, Zavok who wanted revenge on Sonic and his friends. When Silver and Blaze makes a deal with Mephiles the Dark, a mysterious sinister hedgehog who looks like Shadow talks about when Sonic was a Iblis Trigger. Mephiles summons a sun god called Solaris and invades Soleanna and It’s up to Sonic, Shadow, Silver and the others along with a reformed Dr. Robotnik and his henchmen and the Sonic clones from the other dimensions to defeat it.
