After failing to escape Bowser's capture *Sonic isn't that fast while in Peach's high heels..
One of his magic koopas has turned Sonic into a female koopa....the fate Peach has been escaping for years.. fortunately for Sonic after the little shock of the transformation... she's taken a liking to her Hedge-Koopa form...

Queen Sonic: Hmmm...Not bad... now my royal subjects.. lets get them pesky Mario Brothers!