Ryu
To become evil Ryu get to player select.You must press and hold START throughout the entire trick. From Ryu move right to Adon, then up to Akuma down to Adon, left to Ryu and while still holding START,press any button. Now you have the evil side of Ryu!

Chun Li
For champion edition Chun Li, highlight Chun Li, hold select for about 5 seconds until you see something appearing on her head,then press any punch or kick button before letting go select.

Akuma
For Evil Akuma highlight Akuma at the charater select screen and hold select, then enter: Down, Right, Right, Down, Left, Down, Left, Down, Right, Right, Right