User blog comment:ShadowDragon135/Black Doom Is The Devil?/@comment-477304-20110201182823/@comment-477304-20110201184149

Also, I believe that Sonic '06 is referencing the devil. Mephilies' name comes from Mephistopheles, a daemon from the legend of Faust, whilst Iblis gets his name from the Islamic Devil. The two characters themselves represent the two aspects of the devil, Mephiles being the False Prophet, who is said misguide many with lies into a life of sin, not too different from how he manipulated Silver and Blaze into tracking down Sonic, or how he tried persuade Shadow into joining him. And Iblis being the Beast, a monster of raw power and ferocity with little conscience.