Alternate costumes
Highlight Benimaru, Choi, K', Kensuu, Kyo, Mai, Mary, Terry, or Whip at the character selection screen, then press C + D.
Fight as Kula Diamond
Highlight Whip at the character selection screen and press Start. Highlight Vanessa and press Start. Highlight Seth and press Start. Highlight Maxima and press Start. Highlight K' and press Start. Highlight the "?" icon and press Start. Then, press Up, Down. Kula Diamond will appear below the "?" icon.
Maniac Strikers
Select Chang, Choi, Iori, Kula, Ryo, Ramon, or Kyo as a character. Highlight the "Another Striker" option at the Striker selection screen, then press Up, Left(3), Right(3), Down. "Another Striker" will change to "Maniac Striker" to confirm correct code entry.
Select winning pose
Press A, B, or C after the last attack, before the pose sequence begins. If your character is the losing fighter, press A, B, or C on controller two at this time.
Alternate costumes...