Mysterious Being

Whats this?? sonic and friends get sucked into another dimension all is fine entil a certain Blue hedgehog is up to his usual antics but what happens when Amy sees something she wish she hadn't when a mysterious hedgehog comes to reek havoc on our heros, all seems lost then an old friend comes to join in on the battle, new people are met while old ones return how will this turn out for everyone, how will Amy deal with this new feeling inside