Alternate costume colors
Press "LP" + MP or LK" + MK" at the character selection screen. Note: There are actually four different colors to choose from.
Play as Shin-True Akuma
Highlight Akuma at the character selection screen. Then, hold [Select] and move down, right, right, down, left, down, left, down, right, right, right. If done correctly, Akuma should be highlighted again. Press any button to select Shin-True Akuma. Note: This may also be enabled in short cut mode.
Play as Chun-Li in her Street Fighter 2 costume
Highlight Chun-Li at the character selection screen. Then, hold [Select] for approximately five seconds and press any attack button. Note: This may also be enabled in short cut mode.