User blog comment:BlurayOriginals/Roleplay Status/@comment-32856285-20120224235550/@comment-32856285-20120225004821

A flat hero means a hero without a sense of real good. In contrast to a real hero, normally they have a revelation; a dark moment that gives them a reason to fight. Which with Sonic, no defining moment is mention; no backstory, no true origin.

A flat hero is normally a character that offers very little characteristics (sonic only fights a guy in an egg shaped ship with super speed as his only use of combat, ergo flat). A hardcore hero is normally given an influence to be heroic, whether be through tragedy, atonement, a reason to fight. Most icons have followed this rule and look at them, they have gained the characteristics that could compared to only legendary.

Face it dude, Sonic sucks compared to other heroes. You think Sonic could be Flash, think again.