You just know there's some jerk screaming at the artists, "No! I want a REALISTIC Sonic!" while they beg and plead, no, they can't really make him realistic, he's not real, he's a weird rubberhose creature like Mickey Mouse, except filtered through Japanese culture and repackaged for Americans.
"See?" they said after the first trailer was released. "We told you he would look weird."
"Fine! I still want him to have HAIR!" the executive thunders. "Hedgehogs should be SHAGGY and FLUFFY!"