King of Fighters 2000, The

Highlight Kyo, Benimaru, K', Terry, Mary, Mai, Whip,or Choi, then press C + D at the character selectionscreen.

Highlight Whip and press Start, *but do not hold it, then highlight Vanessa and again press start but *don't hold it, then Highlight Seth and again press Start again, Now highlight Maxima and press Start then on K' and press start , now the final thing is to highlight ? icon and press start then UP then Down ''and you will see Kula Appears below the *? icon in 2 secs ''

When you are at the 'Striker Select' screen, place yourself on the 'Another Striker' and do the following: up, left x3, right x3, down. The Another Striker will then change to the Maniac Striker.
This code works for these characters only: Chang, Choi, Iori, Kula, Ryo, Ramon, and Kyo.