Mephiles the Dark

Mephiles was the manifestation of the mind and will of the sun god Solaris. He was born during the Solaris Project when the experiments on Solaris split him into Mephiles and Iblis. After his birth, Mephiles was sealed inside the Scepter of Darkness by a time-traveling Shadow the Hedgehog, but was accidentally freed a decade later during a skirmish between Shadow, Rouge the Bat, and Doctor Eggman.

Upon his release, Mephiles orchestrated a time-traveling plan to torment Shadow and release Iblis from Princess Elise the Third, successfully killing Sonic the Hedgehog. He reunited with Iblis to recreate Solaris, but was defeated by Sonic, Shadow, and Silver the Hedgehog. When Sonic and Elise traveled back in time to prevent the Solaris Project, Mephiles was unwritten from the timeline.