Ultimate Code
Go to the start screen and enter Circle, X, Triangle, Square, Square, Circle, Triangle.

Easy kills!
This is a hint but it makes killing the enemies so easy that it seems like a cheat. You may have heard it before. I equipp the blizzard ring, activate it, walk up to the creature and it drops, usually before I need to activate it again. I killed the cockatrice boss in the magic testing center without being hit myself. It will also work on flying creatures by looking up. If you like a challenging gameplay, don't do this! You can just keep it activated and walk through the area.

PS2 Cheats for Eternal Ring

Eternal Ring cheat codes

Eternal Ring cheats