Tails is brown, because this is the original USA version of tails. Tails doesn't go by the name tails. He has been nicknamed "blades" because in a harsh battle between eggman and tails, his tails got ripped off and tails replaced them with blades. Eggman died by tails in a different battle. sonic died while helping the good eggman but during the explosion that turns eggman bad it killed him. Tails never met sonic. Tails still gets bullied, so he slices off their heads with the blades