User blog comment:Skyblade743/Every Unsolved Question in Sonic./@comment-30144664-20180102134442/@comment-32712012-20180102185614

''Teenage Mutant Ninja Hedgehogs! Teenage Mutant Ninja Hedgehogs!''

Et cetera, et cetera.

Somehow I feel like mutants wouldn't exist in the Sonic Universe. In the Archie universe, it could all be explained by means of Gene Bombs. In the game universe, there isn't really a good answer, but I think if SEGA said "mutants", everyone would immediately scream "Stop copying Marvel!" So no mutants in the Sonic universe.