X-Men vs. Street Fighter Cheats

Place the cursor to the left, or right, of the character you wish to have two of. Move the cursor onto the character and HOLD the joystick, so that the cursor begins to scroll via the Random Character function. Then, Select that same character, Either by manually timing it or by luck, and the cursor will reappear on that character, allowing you to select it again.

After you win a match and your character does his/her victory pose, press Start. You'll be able to attack your fallen opponent while he/she is down.