Dangerous Duo: part 1

In a distant alternate universe, the great Doctor Robotnik studied the chaotic power the hero Sonic the Hedgehog possessed after he lost control and resulted to carnage across the planet. After Sonic rid himself of its destructive control, the great Doctor took particles of the chaos aura and made a clone to destroy Sonic with it. This clone ends up being a female Hedgehog named Blur and later on is given a choice between right and wrong.