King Of Fighters 2000 Cheat Codes for Dreamcast

Select victory pose
Press a Punch or Kick button immediately after your opponent is defeated.

Special Puzzles
Successfully complete single or team modes under any difficulty setting.

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.

Fight as Zero in practice mode
Select any two fighters in practice mode for yourself and the CPU. Hold Up and press HP when selecting the first fighter in your team order. A sound will confirm correct code entry. The second fighter will be automatically be selected. When the match begins, you will be controlling Zero.

Maniac Strikers
Select Chang, Choi, Iori, Kula, Ryo, Ramon, Kasumi, 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.