Amy: Slower is better, ever heard of the turtle and the rabbit?Also TSDude do you even remember the BP of this game, its not gonna be about speed so even if amy was included it would totally make since.
Knuckles: You won't find that drill power-up in every single foot of the level so he can come in handy with his digging powers.
Tails:Same thing as knuckles but with whatever power-up that makes sonic fly, he'd be good for IDK using his tail swipe to cut weeds or such like in SA1 for rings or item boxes eh.
Goodbye Hedgehogs, Hello plumbers!