Soul Calibur 2 Cheat Codes for Gamecube

A Way to Defeat Inferno
Use Link to battle Inferno. Even if you're a beginner, Inferno should be pretty easy. If Inferno is giving you a hard time, back off and use Link's boomerang, bow & arrow, and/or bombs.
submitted by: Nathan Yuen

Unlock Characters in Weapon Master Mode
Play through Weapon Master mode to unlock characters, modes and stages. As you beat a character in Weapon Master Mode, that character will be unlocked for use in other modes. Unlockable characters include:

Cervantes
Charade
Lizard Man
Seung Mena
Yoshimitsu

Unlock Sophitia
In weapon mode, keep hitting Sophita's little sister to unlock a playable version of her character.

Unlock Seung Mina
In chapter 6 of weapon master mode, a palace icon will be in the middle. Fight Seung Mina there, win, and unlock the Korean princess for play in all modes.