Plasma Sword: Nightmare of Bilstein Cheat Codes for Dreamcast

Play as Rai-On
Highlight Byakko and press the joystick in the following directions: UP, DOWN, LEFT, LEFT, RIGHT, LEFT, and UP.

Play as Evil Gamof
Highligh Gamof and hit Start + A.

Play as Kaede
Highlight Rain on character select screen, Then press DOWN, DOWN, LEFT, LEFT, UP and Kaede will appear over Rain.